Home / 20,760.18-31,135.68-8,277.90

Finding the Fourth Proportional to 20,760.18, 31,135.68 and 8,277.90

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Solution

The fourth proportional to 20,760.18, 31,135.68 and 8,277.90 is: 12,415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.18 : 31,135.68 = 8,277.90 : x
  2. Step 2: Convert to fraction form
    20,760.18/31,135.68 = 8,277.90/x
  3. Step 3: Cross multiply
    20,760.18x = 31,135.68 × 8,277.90
  4. Step 4: Simplify right side
    20,760.18x = 257,738,045.47
  5. Step 5: Solve for x
    x = 257,738,045.47/20,760.18
  6. Step 6: Final answer
    x = 12,415.02

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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.