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Finding the Fourth Proportional to 10,520.76, 15,781.62 and 3,944.76

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Solution

The fourth proportional to 10,520.76, 15,781.62 and 3,944.76 is: 5,917.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.76 : 15,781.62 = 3,944.76 : x
  2. Step 2: Convert to fraction form
    10,520.76/15,781.62 = 3,944.76/x
  3. Step 3: Cross multiply
    10,520.76x = 15,781.62 × 3,944.76
  4. Step 4: Simplify right side
    10,520.76x = 62,254,703.31
  5. Step 5: Solve for x
    x = 62,254,703.31/10,520.76
  6. Step 6: Final answer
    x = 5,917.32

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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.