Home / 28,255.68-38,991.51-15,680.16

Finding the Fourth Proportional to 28,255.68, 38,991.51 and 15,680.16

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Solution

The fourth proportional to 28,255.68, 38,991.51 and 15,680.16 is: 21,637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.68 : 38,991.51 = 15,680.16 : x
  2. Step 2: Convert to fraction form
    28,255.68/38,991.51 = 15,680.16/x
  3. Step 3: Cross multiply
    28,255.68x = 38,991.51 × 15,680.16
  4. Step 4: Simplify right side
    28,255.68x = 611,393,115.44
  5. Step 5: Solve for x
    x = 611,393,115.44/28,255.68
  6. Step 6: Final answer
    x = 21,637.88

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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.