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Finding the Fourth Proportional to 19,007.80, 28,511.70 and 13,102.90

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Solution

The fourth proportional to 19,007.80, 28,511.70 and 13,102.90 is: 19,654.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,007.80 : 28,511.70 = 13,102.90 : x
  2. Step 2: Convert to fraction form
    19,007.80/28,511.70 = 13,102.90/x
  3. Step 3: Cross multiply
    19,007.80x = 28,511.70 × 13,102.90
  4. Step 4: Simplify right side
    19,007.80x = 373,585,953.93
  5. Step 5: Solve for x
    x = 373,585,953.93/19,007.80
  6. Step 6: Final answer
    x = 19,654.35

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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.