Home / 28,366.68-39,199.97-21,280.80

Finding the Fourth Proportional to 28,366.68, 39,199.97 and 21,280.80

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Solution

The fourth proportional to 28,366.68, 39,199.97 and 21,280.80 is: 29,407.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.68 : 39,199.97 = 21,280.80 : x
  2. Step 2: Convert to fraction form
    28,366.68/39,199.97 = 21,280.80/x
  3. Step 3: Cross multiply
    28,366.68x = 39,199.97 × 21,280.80
  4. Step 4: Simplify right side
    28,366.68x = 834,206,721.58
  5. Step 5: Solve for x
    x = 834,206,721.58/28,366.68
  6. Step 6: Final answer
    x = 29,407.98

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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.