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Finding the Fourth Proportional to 30,078.45, 45,108.92 and 9,017.65

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Solution

The fourth proportional to 30,078.45, 45,108.92 and 9,017.65 is: 13,523.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,078.45 : 45,108.92 = 9,017.65 : x
  2. Step 2: Convert to fraction form
    30,078.45/45,108.92 = 9,017.65/x
  3. Step 3: Cross multiply
    30,078.45x = 45,108.92 × 9,017.65
  4. Step 4: Simplify right side
    30,078.45x = 406,776,407.35
  5. Step 5: Solve for x
    x = 406,776,407.35/30,078.45
  6. Step 6: Final answer
    x = 13,523.85

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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.