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Finding the Fourth Proportional to 8,531.77, 11,785.32 and 7,735.98

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Solution

The fourth proportional to 8,531.77, 11,785.32 and 7,735.98 is: 10,686.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.77 : 11,785.32 = 7,735.98 : x
  2. Step 2: Convert to fraction form
    8,531.77/11,785.32 = 7,735.98/x
  3. Step 3: Cross multiply
    8,531.77x = 11,785.32 × 7,735.98
  4. Step 4: Simplify right side
    8,531.77x = 91,170,999.81
  5. Step 5: Solve for x
    x = 91,170,999.81/8,531.77
  6. Step 6: Final answer
    x = 10,686.06

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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.