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Finding the Fourth Proportional to 8,718.12, 12,030.66 and 4,739.15

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Solution

The fourth proportional to 8,718.12, 12,030.66 and 4,739.15 is: 6,539.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.12 : 12,030.66 = 4,739.15 : x
  2. Step 2: Convert to fraction form
    8,718.12/12,030.66 = 4,739.15/x
  3. Step 3: Cross multiply
    8,718.12x = 12,030.66 × 4,739.15
  4. Step 4: Simplify right side
    8,718.12x = 57,015,042.19
  5. Step 5: Solve for x
    x = 57,015,042.19/8,718.12
  6. Step 6: Final answer
    x = 6,539.83

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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.