Home / 28,158.66-42,252.66-20,431.26

Finding the Fourth Proportional to 28,158.66, 42,252.66 and 20,431.26

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Solution

The fourth proportional to 28,158.66, 42,252.66 and 20,431.26 is: 30,657.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.66 : 42,252.66 = 20,431.26 : x
  2. Step 2: Convert to fraction form
    28,158.66/42,252.66 = 20,431.26/x
  3. Step 3: Cross multiply
    28,158.66x = 42,252.66 × 20,431.26
  4. Step 4: Simplify right side
    28,158.66x = 863,275,082.15
  5. Step 5: Solve for x
    x = 863,275,082.15/28,158.66
  6. Step 6: Final answer
    x = 30,657.53

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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.