Home / 15,657.38-21,607.25-8,487.30

Finding the Fourth Proportional to 15,657.38, 21,607.25 and 8,487.30

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Solution

The fourth proportional to 15,657.38, 21,607.25 and 8,487.30 is: 11,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,657.38 : 21,607.25 = 8,487.30 : x
  2. Step 2: Convert to fraction form
    15,657.38/21,607.25 = 8,487.30/x
  3. Step 3: Cross multiply
    15,657.38x = 21,607.25 × 8,487.30
  4. Step 4: Simplify right side
    15,657.38x = 183,387,212.93
  5. Step 5: Solve for x
    x = 183,387,212.93/15,657.38
  6. Step 6: Final answer
    x = 11,712.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.