Home / 20,242.47-27,942.32-15,221.28

Finding the Fourth Proportional to 20,242.47, 27,942.32 and 15,221.28

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Solution

The fourth proportional to 20,242.47, 27,942.32 and 15,221.28 is: 21,011.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,242.47 : 27,942.32 = 15,221.28 : x
  2. Step 2: Convert to fraction form
    20,242.47/27,942.32 = 15,221.28/x
  3. Step 3: Cross multiply
    20,242.47x = 27,942.32 × 15,221.28
  4. Step 4: Simplify right side
    20,242.47x = 425,317,876.57
  5. Step 5: Solve for x
    x = 425,317,876.57/20,242.47
  6. Step 6: Final answer
    x = 21,011.16

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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.