Home / 20,882.08-28,816.80-11,451.20

Finding the Fourth Proportional to 20,882.08, 28,816.80 and 11,451.20

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Solution

The fourth proportional to 20,882.08, 28,816.80 and 11,451.20 is: 15,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.08 : 28,816.80 = 11,451.20 : x
  2. Step 2: Convert to fraction form
    20,882.08/28,816.80 = 11,451.20/x
  3. Step 3: Cross multiply
    20,882.08x = 28,816.80 × 11,451.20
  4. Step 4: Simplify right side
    20,882.08x = 329,986,940.16
  5. Step 5: Solve for x
    x = 329,986,940.16/20,882.08
  6. Step 6: Final answer
    x = 15,802.40

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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.