Home / 15,188.22-20,948.43-11,153.78

Finding the Fourth Proportional to 15,188.22, 20,948.43 and 11,153.78

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Solution

The fourth proportional to 15,188.22, 20,948.43 and 11,153.78 is: 15,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,188.22 : 20,948.43 = 11,153.78 : x
  2. Step 2: Convert to fraction form
    15,188.22/20,948.43 = 11,153.78/x
  3. Step 3: Cross multiply
    15,188.22x = 20,948.43 × 11,153.78
  4. Step 4: Simplify right side
    15,188.22x = 233,654,019.05
  5. Step 5: Solve for x
    x = 233,654,019.05/15,188.22
  6. Step 6: Final answer
    x = 15,383.90

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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.