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Finding the Fourth Proportional to 7,113.45, 9,807.31 and 4,871.44

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Solution

The fourth proportional to 7,113.45, 9,807.31 and 4,871.44 is: 6,716.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.45 : 9,807.31 = 4,871.44 : x
  2. Step 2: Convert to fraction form
    7,113.45/9,807.31 = 4,871.44/x
  3. Step 3: Cross multiply
    7,113.45x = 9,807.31 × 4,871.44
  4. Step 4: Simplify right side
    7,113.45x = 47,775,740.57
  5. Step 5: Solve for x
    x = 47,775,740.57/7,113.45
  6. Step 6: Final answer
    x = 6,716.25

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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.