Home / 27,711.78-38,192.82-20,981.34

Finding the Fourth Proportional to 27,711.78, 38,192.82 and 20,981.34

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Solution

The fourth proportional to 27,711.78, 38,192.82 and 20,981.34 is: 28,916.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,711.78 : 38,192.82 = 20,981.34 : x
  2. Step 2: Convert to fraction form
    27,711.78/38,192.82 = 20,981.34/x
  3. Step 3: Cross multiply
    27,711.78x = 38,192.82 × 20,981.34
  4. Step 4: Simplify right side
    27,711.78x = 801,336,541.98
  5. Step 5: Solve for x
    x = 801,336,541.98/27,711.78
  6. Step 6: Final answer
    x = 28,916.82

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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.