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Finding the Fourth Proportional to 8,718.39, 12,030.86 and 4,739.47

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Solution

The fourth proportional to 8,718.39, 12,030.86 and 4,739.47 is: 6,540.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.39 : 12,030.86 = 4,739.47 : x
  2. Step 2: Convert to fraction form
    8,718.39/12,030.86 = 4,739.47/x
  3. Step 3: Cross multiply
    8,718.39x = 12,030.86 × 4,739.47
  4. Step 4: Simplify right side
    8,718.39x = 57,019,881.82
  5. Step 5: Solve for x
    x = 57,019,881.82/8,718.39
  6. Step 6: Final answer
    x = 6,540.18

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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.