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Finding the Fourth Proportional to 30,381.86, 41,929.04 and 16,955.70

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Solution

The fourth proportional to 30,381.86, 41,929.04 and 16,955.70 is: 23,400.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,381.86 : 41,929.04 = 16,955.70 : x
  2. Step 2: Convert to fraction form
    30,381.86/41,929.04 = 16,955.70/x
  3. Step 3: Cross multiply
    30,381.86x = 41,929.04 × 16,955.70
  4. Step 4: Simplify right side
    30,381.86x = 710,936,138.75
  5. Step 5: Solve for x
    x = 710,936,138.75/30,381.86
  6. Step 6: Final answer
    x = 23,400.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.