Home / 15,191.05-20,964.82-8,386.40

Finding the Fourth Proportional to 15,191.05, 20,964.82 and 8,386.40

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Solution

The fourth proportional to 15,191.05, 20,964.82 and 8,386.40 is: 11,573.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.05 : 20,964.82 = 8,386.40 : x
  2. Step 2: Convert to fraction form
    15,191.05/20,964.82 = 8,386.40/x
  3. Step 3: Cross multiply
    15,191.05x = 20,964.82 × 8,386.40
  4. Step 4: Simplify right side
    15,191.05x = 175,819,371.69
  5. Step 5: Solve for x
    x = 175,819,371.69/15,191.05
  6. Step 6: Final answer
    x = 11,573.88

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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.