Home / 28,231.20-38,961.36-15,660

Finding the Fourth Proportional to 28,231.20, 38,961.36 and 15,660

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Solution

The fourth proportional to 28,231.20, 38,961.36 and 15,660 is: 21,612.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.20 : 38,961.36 = 15,660 : x
  2. Step 2: Convert to fraction form
    28,231.20/38,961.36 = 15,660/x
  3. Step 3: Cross multiply
    28,231.20x = 38,961.36 × 15,660
  4. Step 4: Simplify right side
    28,231.20x = 610,134,897.60
  5. Step 5: Solve for x
    x = 610,134,897.60/28,231.20
  6. Step 6: Final answer
    x = 21,612.08

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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.