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Finding the Fourth Proportional to 30,078.78, 45,125.97 and 9,017.97

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Solution

The fourth proportional to 30,078.78, 45,125.97 and 9,017.97 is: 13,529.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,078.78 : 45,125.97 = 9,017.97 : x
  2. Step 2: Convert to fraction form
    30,078.78/45,125.97 = 9,017.97/x
  3. Step 3: Cross multiply
    30,078.78x = 45,125.97 × 9,017.97
  4. Step 4: Simplify right side
    30,078.78x = 406,944,643.68
  5. Step 5: Solve for x
    x = 406,944,643.68/30,078.78
  6. Step 6: Final answer
    x = 13,529.29

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1.5x scale

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.