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Finding the Fourth Proportional to 8,681.59, 11,980.55 and 4,702.69

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Solution

The fourth proportional to 8,681.59, 11,980.55 and 4,702.69 is: 6,489.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.59 : 11,980.55 = 4,702.69 : x
  2. Step 2: Convert to fraction form
    8,681.59/11,980.55 = 4,702.69/x
  3. Step 3: Cross multiply
    8,681.59x = 11,980.55 × 4,702.69
  4. Step 4: Simplify right side
    8,681.59x = 56,340,794.48
  5. Step 5: Solve for x
    x = 56,340,794.48/8,681.59
  6. Step 6: Final answer
    x = 6,489.69

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.