Home / 28,475.76-42,689.33-20,129.52

Finding the Fourth Proportional to 28,475.76, 42,689.33 and 20,129.52

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Solution

The fourth proportional to 28,475.76, 42,689.33 and 20,129.52 is: 30,177.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.76 : 42,689.33 = 20,129.52 : x
  2. Step 2: Convert to fraction form
    28,475.76/42,689.33 = 20,129.52/x
  3. Step 3: Cross multiply
    28,475.76x = 42,689.33 × 20,129.52
  4. Step 4: Simplify right side
    28,475.76x = 859,315,722.02
  5. Step 5: Solve for x
    x = 859,315,722.02/28,475.76
  6. Step 6: Final answer
    x = 30,177.10

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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.