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Finding the Fourth Proportional to 8,785.36, 13,117.86 and 7,486.16

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Solution

The fourth proportional to 8,785.36, 13,117.86 and 7,486.16 is: 11,177.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.36 : 13,117.86 = 7,486.16 : x
  2. Step 2: Convert to fraction form
    8,785.36/13,117.86 = 7,486.16/x
  3. Step 3: Cross multiply
    8,785.36x = 13,117.86 × 7,486.16
  4. Step 4: Simplify right side
    8,785.36x = 98,202,398.82
  5. Step 5: Solve for x
    x = 98,202,398.82/8,785.36
  6. Step 6: Final answer
    x = 11,177.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.