Home / 15,505.49-21,397.78-8,790.97

Finding the Fourth Proportional to 15,505.49, 21,397.78 and 8,790.97

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Solution

The fourth proportional to 15,505.49, 21,397.78 and 8,790.97 is: 12,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.49 : 21,397.78 = 8,790.97 : x
  2. Step 2: Convert to fraction form
    15,505.49/21,397.78 = 8,790.97/x
  3. Step 3: Cross multiply
    15,505.49x = 21,397.78 × 8,790.97
  4. Step 4: Simplify right side
    15,505.49x = 188,107,242.05
  5. Step 5: Solve for x
    x = 188,107,242.05/15,505.49
  6. Step 6: Final answer
    x = 12,131.65

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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.