Home / 15,355.20-21,162.84-13,225.20

Finding the Fourth Proportional to 15,355.20, 21,162.84 and 13,225.20

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Solution

The fourth proportional to 15,355.20, 21,162.84 and 13,225.20 is: 18,227.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.20 : 21,162.84 = 13,225.20 : x
  2. Step 2: Convert to fraction form
    15,355.20/21,162.84 = 13,225.20/x
  3. Step 3: Cross multiply
    15,355.20x = 21,162.84 × 13,225.20
  4. Step 4: Simplify right side
    15,355.20x = 279,882,791.57
  5. Step 5: Solve for x
    x = 279,882,791.57/15,355.20
  6. Step 6: Final answer
    x = 18,227.23

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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.