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Finding the Fourth Proportional to 8,479.58, 11,700.68 and 4,702.55

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Solution

The fourth proportional to 8,479.58, 11,700.68 and 4,702.55 is: 6,488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.58 : 11,700.68 = 4,702.55 : x
  2. Step 2: Convert to fraction form
    8,479.58/11,700.68 = 4,702.55/x
  3. Step 3: Cross multiply
    8,479.58x = 11,700.68 × 4,702.55
  4. Step 4: Simplify right side
    8,479.58x = 55,022,950.72
  5. Step 5: Solve for x
    x = 55,022,950.72/8,479.58
  6. Step 6: Final answer
    x = 6,488.88

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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.