Home / 11,128.54-15,356.03-8,865.65

Finding the Fourth Proportional to 11,128.54, 15,356.03 and 8,865.65

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Solution

The fourth proportional to 11,128.54, 15,356.03 and 8,865.65 is: 12,233.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.54 : 15,356.03 = 8,865.65 : x
  2. Step 2: Convert to fraction form
    11,128.54/15,356.03 = 8,865.65/x
  3. Step 3: Cross multiply
    11,128.54x = 15,356.03 × 8,865.65
  4. Step 4: Simplify right side
    11,128.54x = 136,141,187.37
  5. Step 5: Solve for x
    x = 136,141,187.37/11,128.54
  6. Step 6: Final answer
    x = 12,233.52

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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.