Home / 15,553.20-21,462.79-8,479.47

Finding the Fourth Proportional to 15,553.20, 21,462.79 and 8,479.47

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Solution

The fourth proportional to 15,553.20, 21,462.79 and 8,479.47 is: 11,701.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,553.20 : 21,462.79 = 8,479.47 : x
  2. Step 2: Convert to fraction form
    15,553.20/21,462.79 = 8,479.47/x
  3. Step 3: Cross multiply
    15,553.20x = 21,462.79 × 8,479.47
  4. Step 4: Simplify right side
    15,553.20x = 181,992,934.21
  5. Step 5: Solve for x
    x = 181,992,934.21/15,553.20
  6. Step 6: Final answer
    x = 11,701.32

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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.