Home / 27,657.28-38,168.88-15,720.64

Finding the Fourth Proportional to 27,657.28, 38,168.88 and 15,720.64

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Solution

The fourth proportional to 27,657.28, 38,168.88 and 15,720.64 is: 21,695.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,657.28 : 38,168.88 = 15,720.64 : x
  2. Step 2: Convert to fraction form
    27,657.28/38,168.88 = 15,720.64/x
  3. Step 3: Cross multiply
    27,657.28x = 38,168.88 × 15,720.64
  4. Step 4: Simplify right side
    27,657.28x = 600,039,221.68
  5. Step 5: Solve for x
    x = 600,039,221.68/27,657.28
  6. Step 6: Final answer
    x = 21,695.53

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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.