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Finding the Fourth Proportional to 57,987.92, 86,987.19 and 18,007.13

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Solution

The fourth proportional to 57,987.92, 86,987.19 and 18,007.13 is: 27,012.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,987.92 : 86,987.19 = 18,007.13 : x
  2. Step 2: Convert to fraction form
    57,987.92/86,987.19 = 18,007.13/x
  3. Step 3: Cross multiply
    57,987.92x = 86,987.19 × 18,007.13
  4. Step 4: Simplify right side
    57,987.92x = 1,566,389,638.66
  5. Step 5: Solve for x
    x = 1,566,389,638.66/57,987.92
  6. Step 6: Final answer
    x = 27,012.34

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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.