Home / 10,308.40-15,434.90-8,481.56

Finding the Fourth Proportional to 10,308.40, 15,434.90 and 8,481.56

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Solution

The fourth proportional to 10,308.40, 15,434.90 and 8,481.56 is: 12,699.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,308.40 : 15,434.90 = 8,481.56 : x
  2. Step 2: Convert to fraction form
    10,308.40/15,434.90 = 8,481.56/x
  3. Step 3: Cross multiply
    10,308.40x = 15,434.90 × 8,481.56
  4. Step 4: Simplify right side
    10,308.40x = 130,912,030.44
  5. Step 5: Solve for x
    x = 130,912,030.44/10,308.40
  6. Step 6: Final answer
    x = 12,699.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.