Home / 21,281.56-31,889.23-8,126.75

Finding the Fourth Proportional to 21,281.56, 31,889.23 and 8,126.75

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Solution

The fourth proportional to 21,281.56, 31,889.23 and 8,126.75 is: 12,177.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.56 : 31,889.23 = 8,126.75 : x
  2. Step 2: Convert to fraction form
    21,281.56/31,889.23 = 8,126.75/x
  3. Step 3: Cross multiply
    21,281.56x = 31,889.23 × 8,126.75
  4. Step 4: Simplify right side
    21,281.56x = 259,155,859.31
  5. Step 5: Solve for x
    x = 259,155,859.31/21,281.56
  6. Step 6: Final answer
    x = 12,177.49

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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.