Home / 20,731.60-31,073.10-10,865.80

Finding the Fourth Proportional to 20,731.60, 31,073.10 and 10,865.80

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Solution

The fourth proportional to 20,731.60, 31,073.10 and 10,865.80 is: 16,285.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.60 : 31,073.10 = 10,865.80 : x
  2. Step 2: Convert to fraction form
    20,731.60/31,073.10 = 10,865.80/x
  3. Step 3: Cross multiply
    20,731.60x = 31,073.10 × 10,865.80
  4. Step 4: Simplify right side
    20,731.60x = 337,634,089.98
  5. Step 5: Solve for x
    x = 337,634,089.98/20,731.60
  6. Step 6: Final answer
    x = 16,285.96

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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.