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Finding the Fourth Proportional to 8,387.76, 11,569.86 and 5,400.48

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Solution

The fourth proportional to 8,387.76, 11,569.86 and 5,400.48 is: 7,449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.76 : 11,569.86 = 5,400.48 : x
  2. Step 2: Convert to fraction form
    8,387.76/11,569.86 = 5,400.48/x
  3. Step 3: Cross multiply
    8,387.76x = 11,569.86 × 5,400.48
  4. Step 4: Simplify right side
    8,387.76x = 62,482,797.53
  5. Step 5: Solve for x
    x = 62,482,797.53/8,387.76
  6. Step 6: Final answer
    x = 7,449.28

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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.