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Finding the Fourth Proportional to 7,920.20, 10,929.06 and 4,562.35

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Solution

The fourth proportional to 7,920.20, 10,929.06 and 4,562.35 is: 6,295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.20 : 10,929.06 = 4,562.35 : x
  2. Step 2: Convert to fraction form
    7,920.20/10,929.06 = 4,562.35/x
  3. Step 3: Cross multiply
    7,920.20x = 10,929.06 × 4,562.35
  4. Step 4: Simplify right side
    7,920.20x = 49,862,169.57
  5. Step 5: Solve for x
    x = 49,862,169.57/7,920.20
  6. Step 6: Final answer
    x = 6,295.57

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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.