Home / 15,195.33-20,971.10-12,956.49

Finding the Fourth Proportional to 15,195.33, 20,971.10 and 12,956.49

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Solution

The fourth proportional to 15,195.33, 20,971.10 and 12,956.49 is: 17,881.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.33 : 20,971.10 = 12,956.49 : x
  2. Step 2: Convert to fraction form
    15,195.33/20,971.10 = 12,956.49/x
  3. Step 3: Cross multiply
    15,195.33x = 20,971.10 × 12,956.49
  4. Step 4: Simplify right side
    15,195.33x = 271,711,879.83
  5. Step 5: Solve for x
    x = 271,711,879.83/15,195.33
  6. Step 6: Final answer
    x = 17,881.28

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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.