Home / 20,987.72-31,487.02-9,298.16

Finding the Fourth Proportional to 20,987.72, 31,487.02 and 9,298.16

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Solution

The fourth proportional to 20,987.72, 31,487.02 and 9,298.16 is: 13,949.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.72 : 31,487.02 = 9,298.16 : x
  2. Step 2: Convert to fraction form
    20,987.72/31,487.02 = 9,298.16/x
  3. Step 3: Cross multiply
    20,987.72x = 31,487.02 × 9,298.16
  4. Step 4: Simplify right side
    20,987.72x = 292,771,349.88
  5. Step 5: Solve for x
    x = 292,771,349.88/20,987.72
  6. Step 6: Final answer
    x = 13,949.65

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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.