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Finding the Fourth Proportional to 7,326.60, 10,989.90 and 4,702.20

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Solution

The fourth proportional to 7,326.60, 10,989.90 and 4,702.20 is: 7,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,326.60 : 10,989.90 = 4,702.20 : x
  2. Step 2: Convert to fraction form
    7,326.60/10,989.90 = 4,702.20/x
  3. Step 3: Cross multiply
    7,326.60x = 10,989.90 × 4,702.20
  4. Step 4: Simplify right side
    7,326.60x = 51,676,707.78
  5. Step 5: Solve for x
    x = 51,676,707.78/7,326.60
  6. Step 6: Final answer
    x = 7,053.30

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Similar ratio
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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.