Home / 27,987.72-38,659.88-20,901.84

Finding the Fourth Proportional to 27,987.72, 38,659.88 and 20,901.84

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Solution

The fourth proportional to 27,987.72, 38,659.88 and 20,901.84 is: 28,872.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.72 : 38,659.88 = 20,901.84 : x
  2. Step 2: Convert to fraction form
    27,987.72/38,659.88 = 20,901.84/x
  3. Step 3: Cross multiply
    27,987.72x = 38,659.88 × 20,901.84
  4. Step 4: Simplify right side
    27,987.72x = 808,062,626.18
  5. Step 5: Solve for x
    x = 808,062,626.18/27,987.72
  6. Step 6: Final answer
    x = 28,872.04

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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.