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Finding the Fourth Proportional to 10,877.47, 15,018.14 and 8,355.08

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Solution

The fourth proportional to 10,877.47, 15,018.14 and 8,355.08 is: 11,535.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,877.47 : 15,018.14 = 8,355.08 : x
  2. Step 2: Convert to fraction form
    10,877.47/15,018.14 = 8,355.08/x
  3. Step 3: Cross multiply
    10,877.47x = 15,018.14 × 8,355.08
  4. Step 4: Simplify right side
    10,877.47x = 125,477,761.15
  5. Step 5: Solve for x
    x = 125,477,761.15/10,877.47
  6. Step 6: Final answer
    x = 11,535.56

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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.