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Finding the Fourth Proportional to 21,555.65, 32,266.65 and 11,670.41

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Solution

The fourth proportional to 21,555.65, 32,266.65 and 11,670.41 is: 17,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.65 : 32,266.65 = 11,670.41 : x
  2. Step 2: Convert to fraction form
    21,555.65/32,266.65 = 11,670.41/x
  3. Step 3: Cross multiply
    21,555.65x = 32,266.65 × 11,670.41
  4. Step 4: Simplify right side
    21,555.65x = 376,565,159.26
  5. Step 5: Solve for x
    x = 376,565,159.26/21,555.65
  6. Step 6: Final answer
    x = 17,469.44

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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.