Home / 15,500.20-21,393.36-9,211.36

Finding the Fourth Proportional to 15,500.20, 21,393.36 and 9,211.36

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Solution

The fourth proportional to 15,500.20, 21,393.36 and 9,211.36 is: 12,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.20 : 21,393.36 = 9,211.36 : x
  2. Step 2: Convert to fraction form
    15,500.20/21,393.36 = 9,211.36/x
  3. Step 3: Cross multiply
    15,500.20x = 21,393.36 × 9,211.36
  4. Step 4: Simplify right side
    15,500.20x = 197,061,940.57
  5. Step 5: Solve for x
    x = 197,061,940.57/15,500.20
  6. Step 6: Final answer
    x = 12,713.51

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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.