Home / 20,889.30-28,826.91-11,458.20

Finding the Fourth Proportional to 20,889.30, 28,826.91 and 11,458.20

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Solution

The fourth proportional to 20,889.30, 28,826.91 and 11,458.20 is: 15,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.30 : 28,826.91 = 11,458.20 : x
  2. Step 2: Convert to fraction form
    20,889.30/28,826.91 = 11,458.20/x
  3. Step 3: Cross multiply
    20,889.30x = 28,826.91 × 11,458.20
  4. Step 4: Simplify right side
    20,889.30x = 330,304,500.16
  5. Step 5: Solve for x
    x = 330,304,500.16/20,889.30
  6. Step 6: Final answer
    x = 15,812.14

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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.