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Finding the Fourth Proportional to 15,868.61, 21,898.62 and 8,795.03

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Solution

The fourth proportional to 15,868.61, 21,898.62 and 8,795.03 is: 12,137.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868.61 : 21,898.62 = 8,795.03 : x
  2. Step 2: Convert to fraction form
    15,868.61/21,898.62 = 8,795.03/x
  3. Step 3: Cross multiply
    15,868.61x = 21,898.62 × 8,795.03
  4. Step 4: Simplify right side
    15,868.61x = 192,599,019.86
  5. Step 5: Solve for x
    x = 192,599,019.86/15,868.61
  6. Step 6: Final answer
    x = 12,137.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.