Home / 28,090.80-42,136.20-18,111.60

Finding the Fourth Proportional to 28,090.80, 42,136.20 and 18,111.60

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Solution

The fourth proportional to 28,090.80, 42,136.20 and 18,111.60 is: 27,167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,090.80 : 42,136.20 = 18,111.60 : x
  2. Step 2: Convert to fraction form
    28,090.80/42,136.20 = 18,111.60/x
  3. Step 3: Cross multiply
    28,090.80x = 42,136.20 × 18,111.60
  4. Step 4: Simplify right side
    28,090.80x = 763,153,999.92
  5. Step 5: Solve for x
    x = 763,153,999.92/28,090.80
  6. Step 6: Final answer
    x = 27,167.40

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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.