Home / 28,775.85-43,161.03-12,981.93

Finding the Fourth Proportional to 28,775.85, 43,161.03 and 12,981.93

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Solution

The fourth proportional to 28,775.85, 43,161.03 and 12,981.93 is: 19,471.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.85 : 43,161.03 = 12,981.93 : x
  2. Step 2: Convert to fraction form
    28,775.85/43,161.03 = 12,981.93/x
  3. Step 3: Cross multiply
    28,775.85x = 43,161.03 × 12,981.93
  4. Step 4: Simplify right side
    28,775.85x = 560,313,470.19
  5. Step 5: Solve for x
    x = 560,313,470.19/28,775.85
  6. Step 6: Final answer
    x = 19,471.66

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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.