Home / 11,905.76-16,436.45-7,872.77

Finding the Fourth Proportional to 11,905.76, 16,436.45 and 7,872.77

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Solution

The fourth proportional to 11,905.76, 16,436.45 and 7,872.77 is: 10,868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.76 : 16,436.45 = 7,872.77 : x
  2. Step 2: Convert to fraction form
    11,905.76/16,436.45 = 7,872.77/x
  3. Step 3: Cross multiply
    11,905.76x = 16,436.45 × 7,872.77
  4. Step 4: Simplify right side
    11,905.76x = 129,400,390.47
  5. Step 5: Solve for x
    x = 129,400,390.47/11,905.76
  6. Step 6: Final answer
    x = 10,868.72

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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.