Home / 10,974.90-15,144.40-6,438.49

Finding the Fourth Proportional to 10,974.90, 15,144.40 and 6,438.49

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Solution

The fourth proportional to 10,974.90, 15,144.40 and 6,438.49 is: 8,884.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,974.90 : 15,144.40 = 6,438.49 : x
  2. Step 2: Convert to fraction form
    10,974.90/15,144.40 = 6,438.49/x
  3. Step 3: Cross multiply
    10,974.90x = 15,144.40 × 6,438.49
  4. Step 4: Simplify right side
    10,974.90x = 97,507,123.33
  5. Step 5: Solve for x
    x = 97,507,123.33/10,974.90
  6. Step 6: Final answer
    x = 8,884.56

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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.