Home / 21,224.28-29,278.54-12,719.64

Finding the Fourth Proportional to 21,224.28, 29,278.54 and 12,719.64

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Solution

The fourth proportional to 21,224.28, 29,278.54 and 12,719.64 is: 17,546.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,224.28 : 29,278.54 = 12,719.64 : x
  2. Step 2: Convert to fraction form
    21,224.28/29,278.54 = 12,719.64/x
  3. Step 3: Cross multiply
    21,224.28x = 29,278.54 × 12,719.64
  4. Step 4: Simplify right side
    21,224.28x = 372,412,488.53
  5. Step 5: Solve for x
    x = 372,412,488.53/21,224.28
  6. Step 6: Final answer
    x = 17,546.53

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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.