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Finding the Fourth Proportional to 5,615.54, 8,422.83 and 1,917.86

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Solution

The fourth proportional to 5,615.54, 8,422.83 and 1,917.86 is: 2,876.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.54 : 8,422.83 = 1,917.86 : x
  2. Step 2: Convert to fraction form
    5,615.54/8,422.83 = 1,917.86/x
  3. Step 3: Cross multiply
    5,615.54x = 8,422.83 × 1,917.86
  4. Step 4: Simplify right side
    5,615.54x = 16,153,808.74
  5. Step 5: Solve for x
    x = 16,153,808.74/5,615.54
  6. Step 6: Final answer
    x = 2,876.63

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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.