Home / 20,735.60-31,079.10-10,869.80

Finding the Fourth Proportional to 20,735.60, 31,079.10 and 10,869.80

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Solution

The fourth proportional to 20,735.60, 31,079.10 and 10,869.80 is: 16,291.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735.60 : 31,079.10 = 10,869.80 : x
  2. Step 2: Convert to fraction form
    20,735.60/31,079.10 = 10,869.80/x
  3. Step 3: Cross multiply
    20,735.60x = 31,079.10 × 10,869.80
  4. Step 4: Simplify right side
    20,735.60x = 337,823,601.18
  5. Step 5: Solve for x
    x = 337,823,601.18/20,735.60
  6. Step 6: Final answer
    x = 16,291.96

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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.