Home / 20,717.60-31,076.40-10,859.90

Finding the Fourth Proportional to 20,717.60, 31,076.40 and 10,859.90

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Solution

The fourth proportional to 20,717.60, 31,076.40 and 10,859.90 is: 16,289.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.60 : 31,076.40 = 10,859.90 : x
  2. Step 2: Convert to fraction form
    20,717.60/31,076.40 = 10,859.90/x
  3. Step 3: Cross multiply
    20,717.60x = 31,076.40 × 10,859.90
  4. Step 4: Simplify right side
    20,717.60x = 337,486,596.36
  5. Step 5: Solve for x
    x = 337,486,596.36/20,717.60
  6. Step 6: Final answer
    x = 16,289.85

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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.