Home / 21,127.52-31,680.56-7,082.64

Finding the Fourth Proportional to 21,127.52, 31,680.56 and 7,082.64

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Solution

The fourth proportional to 21,127.52, 31,680.56 and 7,082.64 is: 10,620.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.52 : 31,680.56 = 7,082.64 : x
  2. Step 2: Convert to fraction form
    21,127.52/31,680.56 = 7,082.64/x
  3. Step 3: Cross multiply
    21,127.52x = 31,680.56 × 7,082.64
  4. Step 4: Simplify right side
    21,127.52x = 224,382,001.48
  5. Step 5: Solve for x
    x = 224,382,001.48/21,127.52
  6. Step 6: Final answer
    x = 10,620.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.