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Finding the Fourth Proportional to 8,718.31, 12,030.82 and 4,739.28

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Solution

The fourth proportional to 8,718.31, 12,030.82 and 4,739.28 is: 6,539.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.31 : 12,030.82 = 4,739.28 : x
  2. Step 2: Convert to fraction form
    8,718.31/12,030.82 = 4,739.28/x
  3. Step 3: Cross multiply
    8,718.31x = 12,030.82 × 4,739.28
  4. Step 4: Simplify right side
    8,718.31x = 57,017,424.61
  5. Step 5: Solve for x
    x = 57,017,424.61/8,718.31
  6. Step 6: Final answer
    x = 6,539.96

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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.