Home / 27,787.68-38,347.20-15,213.60

Finding the Fourth Proportional to 27,787.68, 38,347.20 and 15,213.60

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Solution

The fourth proportional to 27,787.68, 38,347.20 and 15,213.60 is: 20,994.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,787.68 : 38,347.20 = 15,213.60 : x
  2. Step 2: Convert to fraction form
    27,787.68/38,347.20 = 15,213.60/x
  3. Step 3: Cross multiply
    27,787.68x = 38,347.20 × 15,213.60
  4. Step 4: Simplify right side
    27,787.68x = 583,398,961.92
  5. Step 5: Solve for x
    x = 583,398,961.92/27,787.68
  6. Step 6: Final answer
    x = 20,994.88

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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.