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Finding the Fourth Proportional to 12,559.62, 18,839.40 and 5,158.86

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Solution

The fourth proportional to 12,559.62, 18,839.40 and 5,158.86 is: 7,738.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,559.62 : 18,839.40 = 5,158.86 : x
  2. Step 2: Convert to fraction form
    12,559.62/18,839.40 = 5,158.86/x
  3. Step 3: Cross multiply
    12,559.62x = 18,839.40 × 5,158.86
  4. Step 4: Simplify right side
    12,559.62x = 97,189,827.08
  5. Step 5: Solve for x
    x = 97,189,827.08/12,559.62
  6. Step 6: Final answer
    x = 7,738.28

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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.