Home / 20,760.06-31,140.90-8,281.20

Finding the Fourth Proportional to 20,760.06, 31,140.90 and 8,281.20

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Solution

The fourth proportional to 20,760.06, 31,140.90 and 8,281.20 is: 12,422.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.06 : 31,140.90 = 8,281.20 : x
  2. Step 2: Convert to fraction form
    20,760.06/31,140.90 = 8,281.20/x
  3. Step 3: Cross multiply
    20,760.06x = 31,140.90 × 8,281.20
  4. Step 4: Simplify right side
    20,760.06x = 257,884,021.08
  5. Step 5: Solve for x
    x = 257,884,021.08/20,760.06
  6. Step 6: Final answer
    x = 12,422.12

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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.