Home / 21,010.17-31,512.12-6,979.96

Finding the Fourth Proportional to 21,010.17, 31,512.12 and 6,979.96

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Solution

The fourth proportional to 21,010.17, 31,512.12 and 6,979.96 is: 10,468.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.17 : 31,512.12 = 6,979.96 : x
  2. Step 2: Convert to fraction form
    21,010.17/31,512.12 = 6,979.96/x
  3. Step 3: Cross multiply
    21,010.17x = 31,512.12 × 6,979.96
  4. Step 4: Simplify right side
    21,010.17x = 219,953,337.12
  5. Step 5: Solve for x
    x = 219,953,337.12/21,010.17
  6. Step 6: Final answer
    x = 10,468.90

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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.