Home / 11,316.78-15,615.87-6,279.69

Finding the Fourth Proportional to 11,316.78, 15,615.87 and 6,279.69

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Solution

The fourth proportional to 11,316.78, 15,615.87 and 6,279.69 is: 8,665.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,316.78 : 15,615.87 = 6,279.69 : x
  2. Step 2: Convert to fraction form
    11,316.78/15,615.87 = 6,279.69/x
  3. Step 3: Cross multiply
    11,316.78x = 15,615.87 × 6,279.69
  4. Step 4: Simplify right side
    11,316.78x = 98,062,822.68
  5. Step 5: Solve for x
    x = 98,062,822.68/11,316.78
  6. Step 6: Final answer
    x = 8,665.26

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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.