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Finding the Fourth Proportional to 7,865.73, 10,854.42 and 4,328.87

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Solution

The fourth proportional to 7,865.73, 10,854.42 and 4,328.87 is: 5,973.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,865.73 : 10,854.42 = 4,328.87 : x
  2. Step 2: Convert to fraction form
    7,865.73/10,854.42 = 4,328.87/x
  3. Step 3: Cross multiply
    7,865.73x = 10,854.42 × 4,328.87
  4. Step 4: Simplify right side
    7,865.73x = 46,987,318.83
  5. Step 5: Solve for x
    x = 46,987,318.83/7,865.73
  6. Step 6: Final answer
    x = 5,973.68

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1.5x scale

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.