Home / 15,520.17-21,417.20-8,805.65

Finding the Fourth Proportional to 15,520.17, 21,417.20 and 8,805.65

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Solution

The fourth proportional to 15,520.17, 21,417.20 and 8,805.65 is: 12,151.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.17 : 21,417.20 = 8,805.65 : x
  2. Step 2: Convert to fraction form
    15,520.17/21,417.20 = 8,805.65/x
  3. Step 3: Cross multiply
    15,520.17x = 21,417.20 × 8,805.65
  4. Step 4: Simplify right side
    15,520.17x = 188,592,395.77
  5. Step 5: Solve for x
    x = 188,592,395.77/15,520.17
  6. Step 6: Final answer
    x = 12,151.44

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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.