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Finding the Fourth Proportional to 21,907.81, 32,877.56 and 8,763.85

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Solution

The fourth proportional to 21,907.81, 32,877.56 and 8,763.85 is: 13,152.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.81 : 32,877.56 = 8,763.85 : x
  2. Step 2: Convert to fraction form
    21,907.81/32,877.56 = 8,763.85/x
  3. Step 3: Cross multiply
    21,907.81x = 32,877.56 × 8,763.85
  4. Step 4: Simplify right side
    21,907.81x = 288,134,004.21
  5. Step 5: Solve for x
    x = 288,134,004.21/21,907.81
  6. Step 6: Final answer
    x = 13,152.11

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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.