Home / 20,439.95-28,170.38-15,125.54

Finding the Fourth Proportional to 20,439.95, 28,170.38 and 15,125.54

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Solution

The fourth proportional to 20,439.95, 28,170.38 and 15,125.54 is: 20,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.95 : 28,170.38 = 15,125.54 : x
  2. Step 2: Convert to fraction form
    20,439.95/28,170.38 = 15,125.54/x
  3. Step 3: Cross multiply
    20,439.95x = 28,170.38 × 15,125.54
  4. Step 4: Simplify right side
    20,439.95x = 426,092,106.47
  5. Step 5: Solve for x
    x = 426,092,106.47/20,439.95
  6. Step 6: Final answer
    x = 20,846.05

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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.