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Finding the Fourth Proportional to 10,422, 15,635.70 and 3,404.16

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Solution

The fourth proportional to 10,422, 15,635.70 and 3,404.16 is: 5,107.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,422 : 15,635.70 = 3,404.16 : x
  2. Step 2: Convert to fraction form
    10,422/15,635.70 = 3,404.16/x
  3. Step 3: Cross multiply
    10,422x = 15,635.70 × 3,404.16
  4. Step 4: Simplify right side
    10,422x = 53,226,424.51
  5. Step 5: Solve for x
    x = 53,226,424.51/10,422
  6. Step 6: Final answer
    x = 5,107.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.