Home / 20,655.72-28,505.12-11,224.29

Finding the Fourth Proportional to 20,655.72, 28,505.12 and 11,224.29

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Solution

The fourth proportional to 20,655.72, 28,505.12 and 11,224.29 is: 15,489.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.72 : 28,505.12 = 11,224.29 : x
  2. Step 2: Convert to fraction form
    20,655.72/28,505.12 = 11,224.29/x
  3. Step 3: Cross multiply
    20,655.72x = 28,505.12 × 11,224.29
  4. Step 4: Simplify right side
    20,655.72x = 319,949,733.36
  5. Step 5: Solve for x
    x = 319,949,733.36/20,655.72
  6. Step 6: Final answer
    x = 15,489.64

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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.