Home / 10,121.12-13,966.64-5,644.72

Finding the Fourth Proportional to 10,121.12, 13,966.64 and 5,644.72

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Solution

The fourth proportional to 10,121.12, 13,966.64 and 5,644.72 is: 7,789.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,121.12 : 13,966.64 = 5,644.72 : x
  2. Step 2: Convert to fraction form
    10,121.12/13,966.64 = 5,644.72/x
  3. Step 3: Cross multiply
    10,121.12x = 13,966.64 × 5,644.72
  4. Step 4: Simplify right side
    10,121.12x = 78,837,772.14
  5. Step 5: Solve for x
    x = 78,837,772.14/10,121.12
  6. Step 6: Final answer
    x = 7,789.43

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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.