Home / 20,389.55-30,574.32-8,379.53

Finding the Fourth Proportional to 20,389.55, 30,574.32 and 8,379.53

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Solution

The fourth proportional to 20,389.55, 30,574.32 and 8,379.53 is: 12,565.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.55 : 30,574.32 = 8,379.53 : x
  2. Step 2: Convert to fraction form
    20,389.55/30,574.32 = 8,379.53/x
  3. Step 3: Cross multiply
    20,389.55x = 30,574.32 × 8,379.53
  4. Step 4: Simplify right side
    20,389.55x = 256,198,278.80
  5. Step 5: Solve for x
    x = 256,198,278.80/20,389.55
  6. Step 6: Final answer
    x = 12,565.18

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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.