Home / 9,111.75-12,581.81-6,137.43

Finding the Fourth Proportional to 9,111.75, 12,581.81 and 6,137.43

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Solution

The fourth proportional to 9,111.75, 12,581.81 and 6,137.43 is: 8,474.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,111.75 : 12,581.81 = 6,137.43 : x
  2. Step 2: Convert to fraction form
    9,111.75/12,581.81 = 6,137.43/x
  3. Step 3: Cross multiply
    9,111.75x = 12,581.81 × 6,137.43
  4. Step 4: Simplify right side
    9,111.75x = 77,219,947.46
  5. Step 5: Solve for x
    x = 77,219,947.46/9,111.75
  6. Step 6: Final answer
    x = 8,474.77

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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.