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Finding the Fourth Proportional to 30,981.83, 46,398.85 and 16,920.83

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Solution

The fourth proportional to 30,981.83, 46,398.85 and 16,920.83 is: 25,340.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.83 : 46,398.85 = 16,920.83 : x
  2. Step 2: Convert to fraction form
    30,981.83/46,398.85 = 16,920.83/x
  3. Step 3: Cross multiply
    30,981.83x = 46,398.85 × 16,920.83
  4. Step 4: Simplify right side
    30,981.83x = 785,107,126.74
  5. Step 5: Solve for x
    x = 785,107,126.74/30,981.83
  6. Step 6: Final answer
    x = 25,340.89

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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.