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Finding the Fourth Proportional to 21,603.16, 32,424.90 and 11,081.08

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Solution

The fourth proportional to 21,603.16, 32,424.90 and 11,081.08 is: 16,631.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.16 : 32,424.90 = 11,081.08 : x
  2. Step 2: Convert to fraction form
    21,603.16/32,424.90 = 11,081.08/x
  3. Step 3: Cross multiply
    21,603.16x = 32,424.90 × 11,081.08
  4. Step 4: Simplify right side
    21,603.16x = 359,302,910.89
  5. Step 5: Solve for x
    x = 359,302,910.89/21,603.16
  6. Step 6: Final answer
    x = 16,631.96

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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.