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Finding the Fourth Proportional to 21,905.29, 32,862.62 and 7,866.01

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Solution

The fourth proportional to 21,905.29, 32,862.62 and 7,866.01 is: 11,800.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.29 : 32,862.62 = 7,866.01 : x
  2. Step 2: Convert to fraction form
    21,905.29/32,862.62 = 7,866.01/x
  3. Step 3: Cross multiply
    21,905.29x = 32,862.62 × 7,866.01
  4. Step 4: Simplify right side
    21,905.29x = 258,497,697.55
  5. Step 5: Solve for x
    x = 258,497,697.55/21,905.29
  6. Step 6: Final answer
    x = 11,800.70

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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.