Home / 10,121.58-13,967.28-5,645.70

Finding the Fourth Proportional to 10,121.58, 13,967.28 and 5,645.70

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Solution

The fourth proportional to 10,121.58, 13,967.28 and 5,645.70 is: 7,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.58 : 13,967.28 = 5,645.70 : x
  2. Step 2: Convert to fraction form
    10,121.58/13,967.28 = 5,645.70/x
  3. Step 3: Cross multiply
    10,121.58x = 13,967.28 × 5,645.70
  4. Step 4: Simplify right side
    10,121.58x = 78,855,072.70
  5. Step 5: Solve for x
    x = 78,855,072.70/10,121.58
  6. Step 6: Final answer
    x = 7,790.79

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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.