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Finding the Fourth Proportional to 5,853.40, 8,781.40 and 2,155.92

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Solution

The fourth proportional to 5,853.40, 8,781.40 and 2,155.92 is: 3,234.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,853.40 : 8,781.40 = 2,155.92 : x
  2. Step 2: Convert to fraction form
    5,853.40/8,781.40 = 2,155.92/x
  3. Step 3: Cross multiply
    5,853.40x = 8,781.40 × 2,155.92
  4. Step 4: Simplify right side
    5,853.40x = 18,931,995.89
  5. Step 5: Solve for x
    x = 18,931,995.89/5,853.40
  6. Step 6: Final answer
    x = 3,234.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.