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Finding the Fourth Proportional to 19,152.70, 28,729.05 and 9,311.20

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Solution

The fourth proportional to 19,152.70, 28,729.05 and 9,311.20 is: 13,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152.70 : 28,729.05 = 9,311.20 : x
  2. Step 2: Convert to fraction form
    19,152.70/28,729.05 = 9,311.20/x
  3. Step 3: Cross multiply
    19,152.70x = 28,729.05 × 9,311.20
  4. Step 4: Simplify right side
    19,152.70x = 267,501,930.36
  5. Step 5: Solve for x
    x = 267,501,930.36/19,152.70
  6. Step 6: Final answer
    x = 13,966.80

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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.