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Finding the Fourth Proportional to 30,625.84, 45,938.74 and 8,439.43

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Solution

The fourth proportional to 30,625.84, 45,938.74 and 8,439.43 is: 12,659.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,625.84 : 45,938.74 = 8,439.43 : x
  2. Step 2: Convert to fraction form
    30,625.84/45,938.74 = 8,439.43/x
  3. Step 3: Cross multiply
    30,625.84x = 45,938.74 × 8,439.43
  4. Step 4: Simplify right side
    30,625.84x = 387,696,780.52
  5. Step 5: Solve for x
    x = 387,696,780.52/30,625.84
  6. Step 6: Final answer
    x = 12,659.14

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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.