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Finding the Fourth Proportional to 9,128.52, 12,578.76 and 6,296.76

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Solution

The fourth proportional to 9,128.52, 12,578.76 and 6,296.76 is: 8,676.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,128.52 : 12,578.76 = 6,296.76 : x
  2. Step 2: Convert to fraction form
    9,128.52/12,578.76 = 6,296.76/x
  3. Step 3: Cross multiply
    9,128.52x = 12,578.76 × 6,296.76
  4. Step 4: Simplify right side
    9,128.52x = 79,205,432.82
  5. Step 5: Solve for x
    x = 79,205,432.82/9,128.52
  6. Step 6: Final answer
    x = 8,676.70

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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.