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Finding the Fourth Proportional to 38,772.40, 58,014.60 and 28,404.40

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Solution

The fourth proportional to 38,772.40, 58,014.60 and 28,404.40 is: 42,501.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,772.40 : 58,014.60 = 28,404.40 : x
  2. Step 2: Convert to fraction form
    38,772.40/58,014.60 = 28,404.40/x
  3. Step 3: Cross multiply
    38,772.40x = 58,014.60 × 28,404.40
  4. Step 4: Simplify right side
    38,772.40x = 1,647,869,904.24
  5. Step 5: Solve for x
    x = 1,647,869,904.24/38,772.40
  6. Step 6: Final answer
    x = 42,501.11

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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.