Home / 10,121.10-13,938.39-8,694.42

Finding the Fourth Proportional to 10,121.10, 13,938.39 and 8,694.42

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Solution

The fourth proportional to 10,121.10, 13,938.39 and 8,694.42 is: 11,973.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.10 : 13,938.39 = 8,694.42 : x
  2. Step 2: Convert to fraction form
    10,121.10/13,938.39 = 8,694.42/x
  3. Step 3: Cross multiply
    10,121.10x = 13,938.39 × 8,694.42
  4. Step 4: Simplify right side
    10,121.10x = 121,186,216.78
  5. Step 5: Solve for x
    x = 121,186,216.78/10,121.10
  6. Step 6: Final answer
    x = 11,973.62

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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.