Home / 20,278.04-27,984.29-11,781.54

Finding the Fourth Proportional to 20,278.04, 27,984.29 and 11,781.54

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Solution

The fourth proportional to 20,278.04, 27,984.29 and 11,781.54 is: 16,258.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.04 : 27,984.29 = 11,781.54 : x
  2. Step 2: Convert to fraction form
    20,278.04/27,984.29 = 11,781.54/x
  3. Step 3: Cross multiply
    20,278.04x = 27,984.29 × 11,781.54
  4. Step 4: Simplify right side
    20,278.04x = 329,697,973.10
  5. Step 5: Solve for x
    x = 329,697,973.10/20,278.04
  6. Step 6: Final answer
    x = 16,258.87

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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.