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Finding the Fourth Proportional to 45,819.84, 68,730.40 and 12,987.84

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Solution

The fourth proportional to 45,819.84, 68,730.40 and 12,987.84 is: 19,481.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,819.84 : 68,730.40 = 12,987.84 : x
  2. Step 2: Convert to fraction form
    45,819.84/68,730.40 = 12,987.84/x
  3. Step 3: Cross multiply
    45,819.84x = 68,730.40 × 12,987.84
  4. Step 4: Simplify right side
    45,819.84x = 892,659,438.34
  5. Step 5: Solve for x
    x = 892,659,438.34/45,819.84
  6. Step 6: Final answer
    x = 19,481.94

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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.