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Finding the Fourth Proportional to 8,917.02, 12,305.50 and 5,557.84

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Solution

The fourth proportional to 8,917.02, 12,305.50 and 5,557.84 is: 7,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,917.02 : 12,305.50 = 5,557.84 : x
  2. Step 2: Convert to fraction form
    8,917.02/12,305.50 = 5,557.84/x
  3. Step 3: Cross multiply
    8,917.02x = 12,305.50 × 5,557.84
  4. Step 4: Simplify right side
    8,917.02x = 68,391,955.46
  5. Step 5: Solve for x
    x = 68,391,955.46/8,917.02
  6. Step 6: Final answer
    x = 7,669.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.