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Finding the Fourth Proportional to 6,615.86, 9,921.83 and 2,917.13

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Solution

The fourth proportional to 6,615.86, 9,921.83 and 2,917.13 is: 4,374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,615.86 : 9,921.83 = 2,917.13 : x
  2. Step 2: Convert to fraction form
    6,615.86/9,921.83 = 2,917.13/x
  3. Step 3: Cross multiply
    6,615.86x = 9,921.83 × 2,917.13
  4. Step 4: Simplify right side
    6,615.86x = 28,943,203.75
  5. Step 5: Solve for x
    x = 28,943,203.75/6,615.86
  6. Step 6: Final answer
    x = 4,374.82

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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.