Home / 8,111.64-11,191.32-6,616.98

Finding the Fourth Proportional to 8,111.64, 11,191.32 and 6,616.98

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Solution

The fourth proportional to 8,111.64, 11,191.32 and 6,616.98 is: 9,129.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,111.64 : 11,191.32 = 6,616.98 : x
  2. Step 2: Convert to fraction form
    8,111.64/11,191.32 = 6,616.98/x
  3. Step 3: Cross multiply
    8,111.64x = 11,191.32 × 6,616.98
  4. Step 4: Simplify right side
    8,111.64x = 74,052,740.61
  5. Step 5: Solve for x
    x = 74,052,740.61/8,111.64
  6. Step 6: Final answer
    x = 9,129.19

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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.