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Finding the Fourth Proportional to 10,917.18, 15,070.05 and 7,390.85

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Solution

The fourth proportional to 10,917.18, 15,070.05 and 7,390.85 is: 10,202.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.18 : 15,070.05 = 7,390.85 : x
  2. Step 2: Convert to fraction form
    10,917.18/15,070.05 = 7,390.85/x
  3. Step 3: Cross multiply
    10,917.18x = 15,070.05 × 7,390.85
  4. Step 4: Simplify right side
    10,917.18x = 111,380,403.69
  5. Step 5: Solve for x
    x = 111,380,403.69/10,917.18
  6. Step 6: Final answer
    x = 10,202.31

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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.