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Finding the Fourth Proportional to 6,864, 9,475.56 and 6,617.76

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Solution

The fourth proportional to 6,864, 9,475.56 and 6,617.76 is: 9,135.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,864 : 9,475.56 = 6,617.76 : x
  2. Step 2: Convert to fraction form
    6,864/9,475.56 = 6,617.76/x
  3. Step 3: Cross multiply
    6,864x = 9,475.56 × 6,617.76
  4. Step 4: Simplify right side
    6,864x = 62,706,981.95
  5. Step 5: Solve for x
    x = 62,706,981.95/6,864
  6. Step 6: Final answer
    x = 9,135.63

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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.