Home / 20,418.93-28,178.42-12,459.87

Finding the Fourth Proportional to 20,418.93, 28,178.42 and 12,459.87

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Solution

The fourth proportional to 20,418.93, 28,178.42 and 12,459.87 is: 17,194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.93 : 28,178.42 = 12,459.87 : x
  2. Step 2: Convert to fraction form
    20,418.93/28,178.42 = 12,459.87/x
  3. Step 3: Cross multiply
    20,418.93x = 28,178.42 × 12,459.87
  4. Step 4: Simplify right side
    20,418.93x = 351,099,387.71
  5. Step 5: Solve for x
    x = 351,099,387.71/20,418.93
  6. Step 6: Final answer
    x = 17,194.80

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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.