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Finding the Fourth Proportional to 18,957.17, 28,439.39 and 7,269.47

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Solution

The fourth proportional to 18,957.17, 28,439.39 and 7,269.47 is: 10,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.17 : 28,439.39 = 7,269.47 : x
  2. Step 2: Convert to fraction form
    18,957.17/28,439.39 = 7,269.47/x
  3. Step 3: Cross multiply
    18,957.17x = 28,439.39 × 7,269.47
  4. Step 4: Simplify right side
    18,957.17x = 206,739,327.17
  5. Step 5: Solve for x
    x = 206,739,327.17/18,957.17
  6. Step 6: Final answer
    x = 10,905.60

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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.