Home / 28,475.28-42,671.39-20,150.78

Finding the Fourth Proportional to 28,475.28, 42,671.39 and 20,150.78

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Solution

The fourth proportional to 28,475.28, 42,671.39 and 20,150.78 is: 30,196.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.28 : 42,671.39 = 20,150.78 : x
  2. Step 2: Convert to fraction form
    28,475.28/42,671.39 = 20,150.78/x
  3. Step 3: Cross multiply
    28,475.28x = 42,671.39 × 20,150.78
  4. Step 4: Simplify right side
    28,475.28x = 859,861,478.07
  5. Step 5: Solve for x
    x = 859,861,478.07/28,475.28
  6. Step 6: Final answer
    x = 30,196.77

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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.