Home / 12,589.61-18,877.05-5,185.71

Finding the Fourth Proportional to 12,589.61, 18,877.05 and 5,185.71

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Solution

The fourth proportional to 12,589.61, 18,877.05 and 5,185.71 is: 7,775.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,589.61 : 18,877.05 = 5,185.71 : x
  2. Step 2: Convert to fraction form
    12,589.61/18,877.05 = 5,185.71/x
  3. Step 3: Cross multiply
    12,589.61x = 18,877.05 × 5,185.71
  4. Step 4: Simplify right side
    12,589.61x = 97,890,906.96
  5. Step 5: Solve for x
    x = 97,890,906.96/12,589.61
  6. Step 6: Final answer
    x = 7,775.53

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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.