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Finding the Fourth Proportional to 6,655.79, 9,966.60 and 6,458.70

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Solution

The fourth proportional to 6,655.79, 9,966.60 and 6,458.70 is: 9,671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,655.79 : 9,966.60 = 6,458.70 : x
  2. Step 2: Convert to fraction form
    6,655.79/9,966.60 = 6,458.70/x
  3. Step 3: Cross multiply
    6,655.79x = 9,966.60 × 6,458.70
  4. Step 4: Simplify right side
    6,655.79x = 64,371,279.42
  5. Step 5: Solve for x
    x = 64,371,279.42/6,655.79
  6. Step 6: Final answer
    x = 9,671.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.