Home / 21,021.60-31,532.40-19,997.60

Finding the Fourth Proportional to 21,021.60, 31,532.40 and 19,997.60

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Solution

The fourth proportional to 21,021.60, 31,532.40 and 19,997.60 is: 29,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.60 : 31,532.40 = 19,997.60 : x
  2. Step 2: Convert to fraction form
    21,021.60/31,532.40 = 19,997.60/x
  3. Step 3: Cross multiply
    21,021.60x = 31,532.40 × 19,997.60
  4. Step 4: Simplify right side
    21,021.60x = 630,572,322.24
  5. Step 5: Solve for x
    x = 630,572,322.24/21,021.60
  6. Step 6: Final answer
    x = 29,996.40

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Similar ratio
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1.5x scale

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.