Home / 45,680.30-68,520.40-12,405.25

Finding the Fourth Proportional to 45,680.30, 68,520.40 and 12,405.25

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Solution

The fourth proportional to 45,680.30, 68,520.40 and 12,405.25 is: 18,607.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,680.30 : 68,520.40 = 12,405.25 : x
  2. Step 2: Convert to fraction form
    45,680.30/68,520.40 = 12,405.25/x
  3. Step 3: Cross multiply
    45,680.30x = 68,520.40 × 12,405.25
  4. Step 4: Simplify right side
    45,680.30x = 850,012,746.74
  5. Step 5: Solve for x
    x = 850,012,746.74/45,680.30
  6. Step 6: Final answer
    x = 18,607.86

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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.