Home / 20,480.28-28,271.49-13,769.80

Finding the Fourth Proportional to 20,480.28, 28,271.49 and 13,769.80

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Solution

The fourth proportional to 20,480.28, 28,271.49 and 13,769.80 is: 19,008.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.28 : 28,271.49 = 13,769.80 : x
  2. Step 2: Convert to fraction form
    20,480.28/28,271.49 = 13,769.80/x
  3. Step 3: Cross multiply
    20,480.28x = 28,271.49 × 13,769.80
  4. Step 4: Simplify right side
    20,480.28x = 389,292,756.87
  5. Step 5: Solve for x
    x = 389,292,756.87/20,480.28
  6. Step 6: Final answer
    x = 19,008.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.