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Finding the Fourth Proportional to 8,391.81, 11,574.39 and 8,019.57

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Solution

The fourth proportional to 8,391.81, 11,574.39 and 8,019.57 is: 11,060.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.81 : 11,574.39 = 8,019.57 : x
  2. Step 2: Convert to fraction form
    8,391.81/11,574.39 = 8,019.57/x
  3. Step 3: Cross multiply
    8,391.81x = 11,574.39 × 8,019.57
  4. Step 4: Simplify right side
    8,391.81x = 92,821,630.81
  5. Step 5: Solve for x
    x = 92,821,630.81/8,391.81
  6. Step 6: Final answer
    x = 11,060.98

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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.