Home / 11,107.84-15,327.68-6,391.20

Finding the Fourth Proportional to 11,107.84, 15,327.68 and 6,391.20

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Solution

The fourth proportional to 11,107.84, 15,327.68 and 6,391.20 is: 8,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,107.84 : 15,327.68 = 6,391.20 : x
  2. Step 2: Convert to fraction form
    11,107.84/15,327.68 = 6,391.20/x
  3. Step 3: Cross multiply
    11,107.84x = 15,327.68 × 6,391.20
  4. Step 4: Simplify right side
    11,107.84x = 97,962,268.42
  5. Step 5: Solve for x
    x = 97,962,268.42/11,107.84
  6. Step 6: Final answer
    x = 8,819.20

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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.