Home / 19,116.15-28,660.25-12,860.61

Finding the Fourth Proportional to 19,116.15, 28,660.25 and 12,860.61

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Solution

The fourth proportional to 19,116.15, 28,660.25 and 12,860.61 is: 19,281.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,116.15 : 28,660.25 = 12,860.61 : x
  2. Step 2: Convert to fraction form
    19,116.15/28,660.25 = 12,860.61/x
  3. Step 3: Cross multiply
    19,116.15x = 28,660.25 × 12,860.61
  4. Step 4: Simplify right side
    19,116.15x = 368,588,233.45
  5. Step 5: Solve for x
    x = 368,588,233.45/19,116.15
  6. Step 6: Final answer
    x = 19,281.51

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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.