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Finding the Fourth Proportional to 5,615.97, 8,424.71 and 1,917.20

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Solution

The fourth proportional to 5,615.97, 8,424.71 and 1,917.20 is: 2,876.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.97 : 8,424.71 = 1,917.20 : x
  2. Step 2: Convert to fraction form
    5,615.97/8,424.71 = 1,917.20/x
  3. Step 3: Cross multiply
    5,615.97x = 8,424.71 × 1,917.20
  4. Step 4: Simplify right side
    5,615.97x = 16,151,854.01
  5. Step 5: Solve for x
    x = 16,151,854.01/5,615.97
  6. Step 6: Final answer
    x = 2,876.06

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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.