Home / 10,921.60-15,059.90-7,378.66

Finding the Fourth Proportional to 10,921.60, 15,059.90 and 7,378.66

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Solution

The fourth proportional to 10,921.60, 15,059.90 and 7,378.66 is: 10,174.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.60 : 15,059.90 = 7,378.66 : x
  2. Step 2: Convert to fraction form
    10,921.60/15,059.90 = 7,378.66/x
  3. Step 3: Cross multiply
    10,921.60x = 15,059.90 × 7,378.66
  4. Step 4: Simplify right side
    10,921.60x = 111,121,881.73
  5. Step 5: Solve for x
    x = 111,121,881.73/10,921.60
  6. Step 6: Final answer
    x = 10,174.51

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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.