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Finding the Fourth Proportional to 8,702.19, 13,053.28 and 8,330.40

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Solution

The fourth proportional to 8,702.19, 13,053.28 and 8,330.40 is: 12,495.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.19 : 13,053.28 = 8,330.40 : x
  2. Step 2: Convert to fraction form
    8,702.19/13,053.28 = 8,330.40/x
  3. Step 3: Cross multiply
    8,702.19x = 13,053.28 × 8,330.40
  4. Step 4: Simplify right side
    8,702.19x = 108,738,957.62
  5. Step 5: Solve for x
    x = 108,738,957.62/8,702.19
  6. Step 6: Final answer
    x = 12,495.59

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Double scale
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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.