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Finding the Fourth Proportional to 5,677.78, 8,518.47 and 2,168.86

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Solution

The fourth proportional to 5,677.78, 8,518.47 and 2,168.86 is: 3,253.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,677.78 : 8,518.47 = 2,168.86 : x
  2. Step 2: Convert to fraction form
    5,677.78/8,518.47 = 2,168.86/x
  3. Step 3: Cross multiply
    5,677.78x = 8,518.47 × 2,168.86
  4. Step 4: Simplify right side
    5,677.78x = 18,475,368.84
  5. Step 5: Solve for x
    x = 18,475,368.84/5,677.78
  6. Step 6: Final answer
    x = 3,253.98

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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.