Home / 10,113.45-13,956.89-5,638.15

Finding the Fourth Proportional to 10,113.45, 13,956.89 and 5,638.15

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Solution

The fourth proportional to 10,113.45, 13,956.89 and 5,638.15 is: 7,780.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,113.45 : 13,956.89 = 5,638.15 : x
  2. Step 2: Convert to fraction form
    10,113.45/13,956.89 = 5,638.15/x
  3. Step 3: Cross multiply
    10,113.45x = 13,956.89 × 5,638.15
  4. Step 4: Simplify right side
    10,113.45x = 78,691,039.35
  5. Step 5: Solve for x
    x = 78,691,039.35/10,113.45
  6. Step 6: Final answer
    x = 7,780.83

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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.