Home / 11,109.84-15,330.12-6,393.20

Finding the Fourth Proportional to 11,109.84, 15,330.12 and 6,393.20

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Solution

The fourth proportional to 11,109.84, 15,330.12 and 6,393.20 is: 8,821.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.84 : 15,330.12 = 6,393.20 : x
  2. Step 2: Convert to fraction form
    11,109.84/15,330.12 = 6,393.20/x
  3. Step 3: Cross multiply
    11,109.84x = 15,330.12 × 6,393.20
  4. Step 4: Simplify right side
    11,109.84x = 98,008,523.18
  5. Step 5: Solve for x
    x = 98,008,523.18/11,109.84
  6. Step 6: Final answer
    x = 8,821.78

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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.