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Finding the Fourth Proportional to 18,809.55, 28,204.61 and 9,439.47

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Solution

The fourth proportional to 18,809.55, 28,204.61 and 9,439.47 is: 14,154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,809.55 : 28,204.61 = 9,439.47 : x
  2. Step 2: Convert to fraction form
    18,809.55/28,204.61 = 9,439.47/x
  3. Step 3: Cross multiply
    18,809.55x = 28,204.61 × 9,439.47
  4. Step 4: Simplify right side
    18,809.55x = 266,236,522.76
  5. Step 5: Solve for x
    x = 266,236,522.76/18,809.55
  6. Step 6: Final answer
    x = 14,154.33

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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.