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Finding the Fourth Proportional to 30,546.88, 45,788.32 and 12,787.72

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Solution

The fourth proportional to 30,546.88, 45,788.32 and 12,787.72 is: 19,168.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,546.88 : 45,788.32 = 12,787.72 : x
  2. Step 2: Convert to fraction form
    30,546.88/45,788.32 = 12,787.72/x
  3. Step 3: Cross multiply
    30,546.88x = 45,788.32 × 12,787.72
  4. Step 4: Simplify right side
    30,546.88x = 585,528,215.43
  5. Step 5: Solve for x
    x = 585,528,215.43/30,546.88
  6. Step 6: Final answer
    x = 19,168.18

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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.