Home / 26,439.60-39,659.40-20,218.80

Finding the Fourth Proportional to 26,439.60, 39,659.40 and 20,218.80

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Solution

The fourth proportional to 26,439.60, 39,659.40 and 20,218.80 is: 30,328.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,439.60 : 39,659.40 = 20,218.80 : x
  2. Step 2: Convert to fraction form
    26,439.60/39,659.40 = 20,218.80/x
  3. Step 3: Cross multiply
    26,439.60x = 39,659.40 × 20,218.80
  4. Step 4: Simplify right side
    26,439.60x = 801,865,476.72
  5. Step 5: Solve for x
    x = 801,865,476.72/26,439.60
  6. Step 6: Final answer
    x = 30,328.20

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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.