Home / 20,901.12-28,843.76-11,470.04

Finding the Fourth Proportional to 20,901.12, 28,843.76 and 11,470.04

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Solution

The fourth proportional to 20,901.12, 28,843.76 and 11,470.04 is: 15,828.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.12 : 28,843.76 = 11,470.04 : x
  2. Step 2: Convert to fraction form
    20,901.12/28,843.76 = 11,470.04/x
  3. Step 3: Cross multiply
    20,901.12x = 28,843.76 × 11,470.04
  4. Step 4: Simplify right side
    20,901.12x = 330,839,080.95
  5. Step 5: Solve for x
    x = 330,839,080.95/20,901.12
  6. Step 6: Final answer
    x = 15,828.77

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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.