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Finding the Fourth Proportional to 7,479.84, 10,321.71 and 4,122.68

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Solution

The fourth proportional to 7,479.84, 10,321.71 and 4,122.68 is: 5,689.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,479.84 : 10,321.71 = 4,122.68 : x
  2. Step 2: Convert to fraction form
    7,479.84/10,321.71 = 4,122.68/x
  3. Step 3: Cross multiply
    7,479.84x = 10,321.71 × 4,122.68
  4. Step 4: Simplify right side
    7,479.84x = 42,553,080.94
  5. Step 5: Solve for x
    x = 42,553,080.94/7,479.84
  6. Step 6: Final answer
    x = 5,689.04

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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.