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Finding the Fourth Proportional to 30,456.67, 45,689.91 and 9,391.78

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Solution

The fourth proportional to 30,456.67, 45,689.91 and 9,391.78 is: 14,089.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,456.67 : 45,689.91 = 9,391.78 : x
  2. Step 2: Convert to fraction form
    30,456.67/45,689.91 = 9,391.78/x
  3. Step 3: Cross multiply
    30,456.67x = 45,689.91 × 9,391.78
  4. Step 4: Simplify right side
    30,456.67x = 429,109,582.94
  5. Step 5: Solve for x
    x = 429,109,582.94/30,456.67
  6. Step 6: Final answer
    x = 14,089.18

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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.