Home / 28,715.78-43,042.88-13,904.30

Finding the Fourth Proportional to 28,715.78, 43,042.88 and 13,904.30

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Solution

The fourth proportional to 28,715.78, 43,042.88 and 13,904.30 is: 20,841.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.78 : 43,042.88 = 13,904.30 : x
  2. Step 2: Convert to fraction form
    28,715.78/43,042.88 = 13,904.30/x
  3. Step 3: Cross multiply
    28,715.78x = 43,042.88 × 13,904.30
  4. Step 4: Simplify right side
    28,715.78x = 598,481,116.38
  5. Step 5: Solve for x
    x = 598,481,116.38/28,715.78
  6. Step 6: Final answer
    x = 20,841.54

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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.