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Finding the Fourth Proportional to 13,251.90, 18,288.89 and 7,587.10

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Solution

The fourth proportional to 13,251.90, 18,288.89 and 7,587.10 is: 10,470.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.90 : 18,288.89 = 7,587.10 : x
  2. Step 2: Convert to fraction form
    13,251.90/18,288.89 = 7,587.10/x
  3. Step 3: Cross multiply
    13,251.90x = 18,288.89 × 7,587.10
  4. Step 4: Simplify right side
    13,251.90x = 138,759,650.70
  5. Step 5: Solve for x
    x = 138,759,650.70/13,251.90
  6. Step 6: Final answer
    x = 10,470.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.