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Finding the Fourth Proportional to 7,854, 11,784.03 and 2,659.86

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Solution

The fourth proportional to 7,854, 11,784.03 and 2,659.86 is: 3,990.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,854 : 11,784.03 = 2,659.86 : x
  2. Step 2: Convert to fraction form
    7,854/11,784.03 = 2,659.86/x
  3. Step 3: Cross multiply
    7,854x = 11,784.03 × 2,659.86
  4. Step 4: Simplify right side
    7,854x = 31,343,870.04
  5. Step 5: Solve for x
    x = 31,343,870.04/7,854
  6. Step 6: Final answer
    x = 3,990.82

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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.