Home / 20,278.04-27,981.78-11,892.92

Finding the Fourth Proportional to 20,278.04, 27,981.78 and 11,892.92

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Solution

The fourth proportional to 20,278.04, 27,981.78 and 11,892.92 is: 16,411.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.04 : 27,981.78 = 11,892.92 : x
  2. Step 2: Convert to fraction form
    20,278.04/27,981.78 = 11,892.92/x
  3. Step 3: Cross multiply
    20,278.04x = 27,981.78 × 11,892.92
  4. Step 4: Simplify right side
    20,278.04x = 332,785,071.00
  5. Step 5: Solve for x
    x = 332,785,071.00/20,278.04
  6. Step 6: Final answer
    x = 16,411.11

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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.