Home / 20,655.81-28,505.19-11,224.37

Finding the Fourth Proportional to 20,655.81, 28,505.19 and 11,224.37

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Solution

The fourth proportional to 20,655.81, 28,505.19 and 11,224.37 is: 15,489.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.81 : 28,505.19 = 11,224.37 : x
  2. Step 2: Convert to fraction form
    20,655.81/28,505.19 = 11,224.37/x
  3. Step 3: Cross multiply
    20,655.81x = 28,505.19 × 11,224.37
  4. Step 4: Simplify right side
    20,655.81x = 319,952,799.48
  5. Step 5: Solve for x
    x = 319,952,799.48/20,655.81
  6. Step 6: Final answer
    x = 15,489.72

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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.