Home / 20,977.61-31,458.20-7,822.80

Finding the Fourth Proportional to 20,977.61, 31,458.20 and 7,822.80

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Solution

The fourth proportional to 20,977.61, 31,458.20 and 7,822.80 is: 11,731.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.61 : 31,458.20 = 7,822.80 : x
  2. Step 2: Convert to fraction form
    20,977.61/31,458.20 = 7,822.80/x
  3. Step 3: Cross multiply
    20,977.61x = 31,458.20 × 7,822.80
  4. Step 4: Simplify right side
    20,977.61x = 246,091,167.85
  5. Step 5: Solve for x
    x = 246,091,167.85/20,977.61
  6. Step 6: Final answer
    x = 11,731.14

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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.