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Finding the Fourth Proportional to 19,152.40, 28,728.60 and 9,310.90

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Solution

The fourth proportional to 19,152.40, 28,728.60 and 9,310.90 is: 13,966.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,152.40 : 28,728.60 = 9,310.90 : x
  2. Step 2: Convert to fraction form
    19,152.40/28,728.60 = 9,310.90/x
  3. Step 3: Cross multiply
    19,152.40x = 28,728.60 × 9,310.90
  4. Step 4: Simplify right side
    19,152.40x = 267,489,121.74
  5. Step 5: Solve for x
    x = 267,489,121.74/19,152.40
  6. Step 6: Final answer
    x = 13,966.35

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Similar ratio
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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.