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Finding the Fourth Proportional to 18,913.06, 28,387.10 and 9,559.68

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Solution

The fourth proportional to 18,913.06, 28,387.10 and 9,559.68 is: 14,348.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.06 : 28,387.10 = 9,559.68 : x
  2. Step 2: Convert to fraction form
    18,913.06/28,387.10 = 9,559.68/x
  3. Step 3: Cross multiply
    18,913.06x = 28,387.10 × 9,559.68
  4. Step 4: Simplify right side
    18,913.06x = 271,371,592.13
  5. Step 5: Solve for x
    x = 271,371,592.13/18,913.06
  6. Step 6: Final answer
    x = 14,348.37

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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.