Home / 20,838.78-28,757.57-11,407.95

Finding the Fourth Proportional to 20,838.78, 28,757.57 and 11,407.95

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Solution

The fourth proportional to 20,838.78, 28,757.57 and 11,407.95 is: 15,743.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.78 : 28,757.57 = 11,407.95 : x
  2. Step 2: Convert to fraction form
    20,838.78/28,757.57 = 11,407.95/x
  3. Step 3: Cross multiply
    20,838.78x = 28,757.57 × 11,407.95
  4. Step 4: Simplify right side
    20,838.78x = 328,064,863.64
  5. Step 5: Solve for x
    x = 328,064,863.64/20,838.78
  6. Step 6: Final answer
    x = 15,743.00

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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.