Home / 15,220.50-21,005.09-9,251.20

Finding the Fourth Proportional to 15,220.50, 21,005.09 and 9,251.20

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Solution

The fourth proportional to 15,220.50, 21,005.09 and 9,251.20 is: 12,767.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.50 : 21,005.09 = 9,251.20 : x
  2. Step 2: Convert to fraction form
    15,220.50/21,005.09 = 9,251.20/x
  3. Step 3: Cross multiply
    15,220.50x = 21,005.09 × 9,251.20
  4. Step 4: Simplify right side
    15,220.50x = 194,322,288.61
  5. Step 5: Solve for x
    x = 194,322,288.61/15,220.50
  6. Step 6: Final answer
    x = 12,767.14

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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.