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Finding the Fourth Proportional to 11,555.22, 15,947.01 and 8,717.61

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Solution

The fourth proportional to 11,555.22, 15,947.01 and 8,717.61 is: 12,030.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,555.22 : 15,947.01 = 8,717.61 : x
  2. Step 2: Convert to fraction form
    11,555.22/15,947.01 = 8,717.61/x
  3. Step 3: Cross multiply
    11,555.22x = 15,947.01 × 8,717.61
  4. Step 4: Simplify right side
    11,555.22x = 139,019,813.85
  5. Step 5: Solve for x
    x = 139,019,813.85/11,555.22
  6. Step 6: Final answer
    x = 12,030.91

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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.