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Finding the Fourth Proportional to 30,390.36, 45,588.72 and 8,203.92

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Solution

The fourth proportional to 30,390.36, 45,588.72 and 8,203.92 is: 12,306.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.36 : 45,588.72 = 8,203.92 : x
  2. Step 2: Convert to fraction form
    30,390.36/45,588.72 = 8,203.92/x
  3. Step 3: Cross multiply
    30,390.36x = 45,588.72 × 8,203.92
  4. Step 4: Simplify right side
    30,390.36x = 374,006,211.78
  5. Step 5: Solve for x
    x = 374,006,211.78/30,390.36
  6. Step 6: Final answer
    x = 12,306.74

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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.