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Finding the Fourth Proportional to 11,350.40, 15,673.50 and 10,978.61

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Solution

The fourth proportional to 11,350.40, 15,673.50 and 10,978.61 is: 15,160.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,350.40 : 15,673.50 = 10,978.61 : x
  2. Step 2: Convert to fraction form
    11,350.40/15,673.50 = 10,978.61/x
  3. Step 3: Cross multiply
    11,350.40x = 15,673.50 × 10,978.61
  4. Step 4: Simplify right side
    11,350.40x = 172,073,165.47
  5. Step 5: Solve for x
    x = 172,073,165.47/11,350.40
  6. Step 6: Final answer
    x = 15,160.10

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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.