Home / 11,101.78-15,320.49-6,385.75

Finding the Fourth Proportional to 11,101.78, 15,320.49 and 6,385.75

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Solution

The fourth proportional to 11,101.78, 15,320.49 and 6,385.75 is: 8,812.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.78 : 15,320.49 = 6,385.75 : x
  2. Step 2: Convert to fraction form
    11,101.78/15,320.49 = 6,385.75/x
  3. Step 3: Cross multiply
    11,101.78x = 15,320.49 × 6,385.75
  4. Step 4: Simplify right side
    11,101.78x = 97,832,819.02
  5. Step 5: Solve for x
    x = 97,832,819.02/11,101.78
  6. Step 6: Final answer
    x = 8,812.35

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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.