Home / 10,921.44-15,065.84-7,385.84

Finding the Fourth Proportional to 10,921.44, 15,065.84 and 7,385.84

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Solution

The fourth proportional to 10,921.44, 15,065.84 and 7,385.84 is: 10,188.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.44 : 15,065.84 = 7,385.84 : x
  2. Step 2: Convert to fraction form
    10,921.44/15,065.84 = 7,385.84/x
  3. Step 3: Cross multiply
    10,921.44x = 15,065.84 × 7,385.84
  4. Step 4: Simplify right side
    10,921.44x = 111,273,883.71
  5. Step 5: Solve for x
    x = 111,273,883.71/10,921.44
  6. Step 6: Final answer
    x = 10,188.57

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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.