Home / 20,589.08-28,412.88-11,157.80

Finding the Fourth Proportional to 20,589.08, 28,412.88 and 11,157.80

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Solution

The fourth proportional to 20,589.08, 28,412.88 and 11,157.80 is: 15,397.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.08 : 28,412.88 = 11,157.80 : x
  2. Step 2: Convert to fraction form
    20,589.08/28,412.88 = 11,157.80/x
  3. Step 3: Cross multiply
    20,589.08x = 28,412.88 × 11,157.80
  4. Step 4: Simplify right side
    20,589.08x = 317,025,232.46
  5. Step 5: Solve for x
    x = 317,025,232.46/20,589.08
  6. Step 6: Final answer
    x = 15,397.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.