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Finding the Fourth Proportional to 8,697.65, 12,002.76 and 4,920.74

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Solution

The fourth proportional to 8,697.65, 12,002.76 and 4,920.74 is: 6,790.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.65 : 12,002.76 = 4,920.74 : x
  2. Step 2: Convert to fraction form
    8,697.65/12,002.76 = 4,920.74/x
  3. Step 3: Cross multiply
    8,697.65x = 12,002.76 × 4,920.74
  4. Step 4: Simplify right side
    8,697.65x = 59,062,398.64
  5. Step 5: Solve for x
    x = 59,062,398.64/8,697.65
  6. Step 6: Final answer
    x = 6,790.62

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Half scale
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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.