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Finding the Fourth Proportional to 8,117.40, 11,201.88 and 4,391.40

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Solution

The fourth proportional to 8,117.40, 11,201.88 and 4,391.40 is: 6,060.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,117.40 : 11,201.88 = 4,391.40 : x
  2. Step 2: Convert to fraction form
    8,117.40/11,201.88 = 4,391.40/x
  3. Step 3: Cross multiply
    8,117.40x = 11,201.88 × 4,391.40
  4. Step 4: Simplify right side
    8,117.40x = 49,191,935.83
  5. Step 5: Solve for x
    x = 49,191,935.83/8,117.40
  6. Step 6: Final answer
    x = 6,060.06

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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.