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Finding the Fourth Proportional to 18,724.08, 28,064.10 and 10,402.08

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Solution

The fourth proportional to 18,724.08, 28,064.10 and 10,402.08 is: 15,590.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.08 : 28,064.10 = 10,402.08 : x
  2. Step 2: Convert to fraction form
    18,724.08/28,064.10 = 10,402.08/x
  3. Step 3: Cross multiply
    18,724.08x = 28,064.10 × 10,402.08
  4. Step 4: Simplify right side
    18,724.08x = 291,925,013.33
  5. Step 5: Solve for x
    x = 291,925,013.33/18,724.08
  6. Step 6: Final answer
    x = 15,590.89

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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.