Home / 20,655.76-28,504.64-11,224.20

Finding the Fourth Proportional to 20,655.76, 28,504.64 and 11,224.20

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Solution

The fourth proportional to 20,655.76, 28,504.64 and 11,224.20 is: 15,489.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.76 : 28,504.64 = 11,224.20 : x
  2. Step 2: Convert to fraction form
    20,655.76/28,504.64 = 11,224.20/x
  3. Step 3: Cross multiply
    20,655.76x = 28,504.64 × 11,224.20
  4. Step 4: Simplify right side
    20,655.76x = 319,941,780.29
  5. Step 5: Solve for x
    x = 319,941,780.29/20,655.76
  6. Step 6: Final answer
    x = 15,489.23

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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.