Home / 21,278.18-31,921.92-6,488.25

Finding the Fourth Proportional to 21,278.18, 31,921.92 and 6,488.25

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Solution

The fourth proportional to 21,278.18, 31,921.92 and 6,488.25 is: 9,733.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.18 : 31,921.92 = 6,488.25 : x
  2. Step 2: Convert to fraction form
    21,278.18/31,921.92 = 6,488.25/x
  3. Step 3: Cross multiply
    21,278.18x = 31,921.92 × 6,488.25
  4. Step 4: Simplify right side
    21,278.18x = 207,117,397.44
  5. Step 5: Solve for x
    x = 207,117,397.44/21,278.18
  6. Step 6: Final answer
    x = 9,733.80

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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.