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Finding the Fourth Proportional to 18,115.80, 24,999.80 and 10,158.02

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Solution

The fourth proportional to 18,115.80, 24,999.80 and 10,158.02 is: 14,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.80 : 24,999.80 = 10,158.02 : x
  2. Step 2: Convert to fraction form
    18,115.80/24,999.80 = 10,158.02/x
  3. Step 3: Cross multiply
    18,115.80x = 24,999.80 × 10,158.02
  4. Step 4: Simplify right side
    18,115.80x = 253,948,468.40
  5. Step 5: Solve for x
    x = 253,948,468.40/18,115.80
  6. Step 6: Final answer
    x = 14,018.07

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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.