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Finding the Fourth Proportional to 10,868.16, 14,992.11 and 7,086.54

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Solution

The fourth proportional to 10,868.16, 14,992.11 and 7,086.54 is: 9,775.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,868.16 : 14,992.11 = 7,086.54 : x
  2. Step 2: Convert to fraction form
    10,868.16/14,992.11 = 7,086.54/x
  3. Step 3: Cross multiply
    10,868.16x = 14,992.11 × 7,086.54
  4. Step 4: Simplify right side
    10,868.16x = 106,242,187.20
  5. Step 5: Solve for x
    x = 106,242,187.20/10,868.16
  6. Step 6: Final answer
    x = 9,775.55

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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.