Home / 12,416.78-17,137.60-7,115.16

Finding the Fourth Proportional to 12,416.78, 17,137.60 and 7,115.16

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Solution

The fourth proportional to 12,416.78, 17,137.60 and 7,115.16 is: 9,820.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,416.78 : 17,137.60 = 7,115.16 : x
  2. Step 2: Convert to fraction form
    12,416.78/17,137.60 = 7,115.16/x
  3. Step 3: Cross multiply
    12,416.78x = 17,137.60 × 7,115.16
  4. Step 4: Simplify right side
    12,416.78x = 121,936,766.02
  5. Step 5: Solve for x
    x = 121,936,766.02/12,416.78
  6. Step 6: Final answer
    x = 9,820.32

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Double scale
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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.