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Finding the Fourth Proportional to 8,929.18, 12,296.28 and 8,358.68

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Solution

The fourth proportional to 8,929.18, 12,296.28 and 8,358.68 is: 11,510.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,929.18 : 12,296.28 = 8,358.68 : x
  2. Step 2: Convert to fraction form
    8,929.18/12,296.28 = 8,358.68/x
  3. Step 3: Cross multiply
    8,929.18x = 12,296.28 × 8,358.68
  4. Step 4: Simplify right side
    8,929.18x = 102,780,669.71
  5. Step 5: Solve for x
    x = 102,780,669.71/8,929.18
  6. Step 6: Final answer
    x = 11,510.65

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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.