Home / 20,957.24-28,921.38-11,397.08

Finding the Fourth Proportional to 20,957.24, 28,921.38 and 11,397.08

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Solution

The fourth proportional to 20,957.24, 28,921.38 and 11,397.08 is: 15,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.24 : 28,921.38 = 11,397.08 : x
  2. Step 2: Convert to fraction form
    20,957.24/28,921.38 = 11,397.08/x
  3. Step 3: Cross multiply
    20,957.24x = 28,921.38 × 11,397.08
  4. Step 4: Simplify right side
    20,957.24x = 329,619,281.57
  5. Step 5: Solve for x
    x = 329,619,281.57/20,957.24
  6. Step 6: Final answer
    x = 15,728.18

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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.