Home / 10,105.77-13,947.35-6,390.57

Finding the Fourth Proportional to 10,105.77, 13,947.35 and 6,390.57

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Solution

The fourth proportional to 10,105.77, 13,947.35 and 6,390.57 is: 8,819.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,105.77 : 13,947.35 = 6,390.57 : x
  2. Step 2: Convert to fraction form
    10,105.77/13,947.35 = 6,390.57/x
  3. Step 3: Cross multiply
    10,105.77x = 13,947.35 × 6,390.57
  4. Step 4: Simplify right side
    10,105.77x = 89,131,484.54
  5. Step 5: Solve for x
    x = 89,131,484.54/10,105.77
  6. Step 6: Final answer
    x = 8,819.86

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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.