Home / 28,256.31-38,992.19-15,680.25

Finding the Fourth Proportional to 28,256.31, 38,992.19 and 15,680.25

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Solution

The fourth proportional to 28,256.31, 38,992.19 and 15,680.25 is: 21,637.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,256.31 : 38,992.19 = 15,680.25 : x
  2. Step 2: Convert to fraction form
    28,256.31/38,992.19 = 15,680.25/x
  3. Step 3: Cross multiply
    28,256.31x = 38,992.19 × 15,680.25
  4. Step 4: Simplify right side
    28,256.31x = 611,407,208.85
  5. Step 5: Solve for x
    x = 611,407,208.85/28,256.31
  6. Step 6: Final answer
    x = 21,637.90

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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.