Home / 11,005.78-15,187.98-6,531.72

Finding the Fourth Proportional to 11,005.78, 15,187.98 and 6,531.72

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Solution

The fourth proportional to 11,005.78, 15,187.98 and 6,531.72 is: 9,013.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.78 : 15,187.98 = 6,531.72 : x
  2. Step 2: Convert to fraction form
    11,005.78/15,187.98 = 6,531.72/x
  3. Step 3: Cross multiply
    11,005.78x = 15,187.98 × 6,531.72
  4. Step 4: Simplify right side
    11,005.78x = 99,203,632.73
  5. Step 5: Solve for x
    x = 99,203,632.73/11,005.78
  6. Step 6: Final answer
    x = 9,013.78

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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.