Home / 27,711.06-38,191.80-20,980.56

Finding the Fourth Proportional to 27,711.06, 38,191.80 and 20,980.56

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Solution

The fourth proportional to 27,711.06, 38,191.80 and 20,980.56 is: 28,915.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,711.06 : 38,191.80 = 20,980.56 : x
  2. Step 2: Convert to fraction form
    27,711.06/38,191.80 = 20,980.56/x
  3. Step 3: Cross multiply
    27,711.06x = 38,191.80 × 20,980.56
  4. Step 4: Simplify right side
    27,711.06x = 801,285,351.41
  5. Step 5: Solve for x
    x = 801,285,351.41/27,711.06
  6. Step 6: Final answer
    x = 28,915.72

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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.