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Finding the Fourth Proportional to 38,610, 57,915 and 10,908.72

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Solution

The fourth proportional to 38,610, 57,915 and 10,908.72 is: 16,363.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,610 : 57,915 = 10,908.72 : x
  2. Step 2: Convert to fraction form
    38,610/57,915 = 10,908.72/x
  3. Step 3: Cross multiply
    38,610x = 57,915 × 10,908.72
  4. Step 4: Simplify right side
    38,610x = 631,778,518.80
  5. Step 5: Solve for x
    x = 631,778,518.80/38,610
  6. Step 6: Final answer
    x = 16,363.08

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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.