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Finding the Fourth Proportional to 48,321.78, 72,479.43 and 13,258.50

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Solution

The fourth proportional to 48,321.78, 72,479.43 and 13,258.50 is: 19,886.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,321.78 : 72,479.43 = 13,258.50 : x
  2. Step 2: Convert to fraction form
    48,321.78/72,479.43 = 13,258.50/x
  3. Step 3: Cross multiply
    48,321.78x = 72,479.43 × 13,258.50
  4. Step 4: Simplify right side
    48,321.78x = 960,968,522.66
  5. Step 5: Solve for x
    x = 960,968,522.66/48,321.78
  6. Step 6: Final answer
    x = 19,886.86

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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.