Home / 20,391.72-30,589.20-8,705.04

Finding the Fourth Proportional to 20,391.72, 30,589.20 and 8,705.04

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Solution

The fourth proportional to 20,391.72, 30,589.20 and 8,705.04 is: 13,058.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.72 : 30,589.20 = 8,705.04 : x
  2. Step 2: Convert to fraction form
    20,391.72/30,589.20 = 8,705.04/x
  3. Step 3: Cross multiply
    20,391.72x = 30,589.20 × 8,705.04
  4. Step 4: Simplify right side
    20,391.72x = 266,280,209.57
  5. Step 5: Solve for x
    x = 266,280,209.57/20,391.72
  6. Step 6: Final answer
    x = 13,058.25

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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.