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Finding the Fourth Proportional to 7,871.94, 10,862.87 and 4,334.47

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Solution

The fourth proportional to 7,871.94, 10,862.87 and 4,334.47 is: 5,981.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.94 : 10,862.87 = 4,334.47 : x
  2. Step 2: Convert to fraction form
    7,871.94/10,862.87 = 4,334.47/x
  3. Step 3: Cross multiply
    7,871.94x = 10,862.87 × 4,334.47
  4. Step 4: Simplify right side
    7,871.94x = 47,084,735.30
  5. Step 5: Solve for x
    x = 47,084,735.30/7,871.94
  6. Step 6: Final answer
    x = 5,981.34

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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.