Home / 21,351.20-32,007.60-13,959.20

Finding the Fourth Proportional to 21,351.20, 32,007.60 and 13,959.20

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Solution

The fourth proportional to 21,351.20, 32,007.60 and 13,959.20 is: 20,926.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.20 : 32,007.60 = 13,959.20 : x
  2. Step 2: Convert to fraction form
    21,351.20/32,007.60 = 13,959.20/x
  3. Step 3: Cross multiply
    21,351.20x = 32,007.60 × 13,959.20
  4. Step 4: Simplify right side
    21,351.20x = 446,800,489.92
  5. Step 5: Solve for x
    x = 446,800,489.92/21,351.20
  6. Step 6: Final answer
    x = 20,926.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.