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Finding the Fourth Proportional to 8,711.64, 12,015.93 and 5,356.29

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Solution

The fourth proportional to 8,711.64, 12,015.93 and 5,356.29 is: 7,387.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.64 : 12,015.93 = 5,356.29 : x
  2. Step 2: Convert to fraction form
    8,711.64/12,015.93 = 5,356.29/x
  3. Step 3: Cross multiply
    8,711.64x = 12,015.93 × 5,356.29
  4. Step 4: Simplify right side
    8,711.64x = 64,360,805.70
  5. Step 5: Solve for x
    x = 64,360,805.70/8,711.64
  6. Step 6: Final answer
    x = 7,387.91

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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.