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Finding the Fourth Proportional to 18,732.40, 28,106.70 and 9,498.40

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Solution

The fourth proportional to 18,732.40, 28,106.70 and 9,498.40 is: 14,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,732.40 : 28,106.70 = 9,498.40 : x
  2. Step 2: Convert to fraction form
    18,732.40/28,106.70 = 9,498.40/x
  3. Step 3: Cross multiply
    18,732.40x = 28,106.70 × 9,498.40
  4. Step 4: Simplify right side
    18,732.40x = 266,968,679.28
  5. Step 5: Solve for x
    x = 266,968,679.28/18,732.40
  6. Step 6: Final answer
    x = 14,251.71

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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.