Home / 21,022,090.80-31,533,136.20-18,630,606.30

Finding the Fourth Proportional to 21,022,090.80, 31,533,136.20 and 18,630,606.30

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Solution

The fourth proportional to 21,022,090.80, 31,533,136.20 and 18,630,606.30 is: 27,945,909.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022,090.80 : 31,533,136.20 = 18,630,606.30 : x
  2. Step 2: Convert to fraction form
    21,022,090.80/31,533,136.20 = 18,630,606.30/x
  3. Step 3: Cross multiply
    21,022,090.80x = 31,533,136.20 × 18,630,606.30
  4. Step 4: Simplify right side
    21,022,090.80x = 587,481,445,946,478.12
  5. Step 5: Solve for x
    x = 587,481,445,946,478.12/21,022,090.80
  6. Step 6: Final answer
    x = 27,945,909.45

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.