Home / 10,721.31-16,079.99-4,479.65

Finding the Fourth Proportional to 10,721.31, 16,079.99 and 4,479.65

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Solution

The fourth proportional to 10,721.31, 16,079.99 and 4,479.65 is: 6,718.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,721.31 : 16,079.99 = 4,479.65 : x
  2. Step 2: Convert to fraction form
    10,721.31/16,079.99 = 4,479.65/x
  3. Step 3: Cross multiply
    10,721.31x = 16,079.99 × 4,479.65
  4. Step 4: Simplify right side
    10,721.31x = 72,032,711.20
  5. Step 5: Solve for x
    x = 72,032,711.20/10,721.31
  6. Step 6: Final answer
    x = 6,718.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.