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Finding the Fourth Proportional to 18,700.47, 28,035.18 and 7,612.38

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Solution

The fourth proportional to 18,700.47, 28,035.18 and 7,612.38 is: 11,412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.47 : 28,035.18 = 7,612.38 : x
  2. Step 2: Convert to fraction form
    18,700.47/28,035.18 = 7,612.38/x
  3. Step 3: Cross multiply
    18,700.47x = 28,035.18 × 7,612.38
  4. Step 4: Simplify right side
    18,700.47x = 213,414,443.53
  5. Step 5: Solve for x
    x = 213,414,443.53/18,700.47
  6. Step 6: Final answer
    x = 11,412.25

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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.