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Finding the Fourth Proportional to 6,891.12, 9,490.32 and 6,869.52

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Solution

The fourth proportional to 6,891.12, 9,490.32 and 6,869.52 is: 9,460.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.12 : 9,490.32 = 6,869.52 : x
  2. Step 2: Convert to fraction form
    6,891.12/9,490.32 = 6,869.52/x
  3. Step 3: Cross multiply
    6,891.12x = 9,490.32 × 6,869.52
  4. Step 4: Simplify right side
    6,891.12x = 65,193,943.05
  5. Step 5: Solve for x
    x = 65,193,943.05/6,891.12
  6. Step 6: Final answer
    x = 9,460.57

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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.