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Finding the Fourth Proportional to 8,711.68, 13,015.04 and 6,945.28

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Solution

The fourth proportional to 8,711.68, 13,015.04 and 6,945.28 is: 10,376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.68 : 13,015.04 = 6,945.28 : x
  2. Step 2: Convert to fraction form
    8,711.68/13,015.04 = 6,945.28/x
  3. Step 3: Cross multiply
    8,711.68x = 13,015.04 × 6,945.28
  4. Step 4: Simplify right side
    8,711.68x = 90,393,097.01
  5. Step 5: Solve for x
    x = 90,393,097.01/8,711.68
  6. Step 6: Final answer
    x = 10,376.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.