Home / 28,105.75-42,179.40-13,314.70

Finding the Fourth Proportional to 28,105.75, 42,179.40 and 13,314.70

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Solution

The fourth proportional to 28,105.75, 42,179.40 and 13,314.70 is: 19,981.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.75 : 42,179.40 = 13,314.70 : x
  2. Step 2: Convert to fraction form
    28,105.75/42,179.40 = 13,314.70/x
  3. Step 3: Cross multiply
    28,105.75x = 42,179.40 × 13,314.70
  4. Step 4: Simplify right side
    28,105.75x = 561,606,057.18
  5. Step 5: Solve for x
    x = 561,606,057.18/28,105.75
  6. Step 6: Final answer
    x = 19,981.89

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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.