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Finding the Fourth Proportional to 6,891.32, 9,382.79 and 6,869.45

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Solution

The fourth proportional to 6,891.32, 9,382.79 and 6,869.45 is: 9,353.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.32 : 9,382.79 = 6,869.45 : x
  2. Step 2: Convert to fraction form
    6,891.32/9,382.79 = 6,869.45/x
  3. Step 3: Cross multiply
    6,891.32x = 9,382.79 × 6,869.45
  4. Step 4: Simplify right side
    6,891.32x = 64,454,606.77
  5. Step 5: Solve for x
    x = 64,454,606.77/6,891.32
  6. Step 6: Final answer
    x = 9,353.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.