Home / 15,921.56-21,972.20-9,549.18

Finding the Fourth Proportional to 15,921.56, 21,972.20 and 9,549.18

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Solution

The fourth proportional to 15,921.56, 21,972.20 and 9,549.18 is: 13,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.56 : 21,972.20 = 9,549.18 : x
  2. Step 2: Convert to fraction form
    15,921.56/21,972.20 = 9,549.18/x
  3. Step 3: Cross multiply
    15,921.56x = 21,972.20 × 9,549.18
  4. Step 4: Simplify right side
    15,921.56x = 209,816,445.05
  5. Step 5: Solve for x
    x = 209,816,445.05/15,921.56
  6. Step 6: Final answer
    x = 13,178.13

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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.