Home / 20,964.88-28,943.52-13,900.92

Finding the Fourth Proportional to 20,964.88, 28,943.52 and 13,900.92

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Solution

The fourth proportional to 20,964.88, 28,943.52 and 13,900.92 is: 19,191.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.88 : 28,943.52 = 13,900.92 : x
  2. Step 2: Convert to fraction form
    20,964.88/28,943.52 = 13,900.92/x
  3. Step 3: Cross multiply
    20,964.88x = 28,943.52 × 13,900.92
  4. Step 4: Simplify right side
    20,964.88x = 402,341,556.04
  5. Step 5: Solve for x
    x = 402,341,556.04/20,964.88
  6. Step 6: Final answer
    x = 19,191.22

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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.