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Finding the Fourth Proportional to 21,331.50, 32,011.83 and 7,480.50

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Solution

The fourth proportional to 21,331.50, 32,011.83 and 7,480.50 is: 11,225.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.50 : 32,011.83 = 7,480.50 : x
  2. Step 2: Convert to fraction form
    21,331.50/32,011.83 = 7,480.50/x
  3. Step 3: Cross multiply
    21,331.50x = 32,011.83 × 7,480.50
  4. Step 4: Simplify right side
    21,331.50x = 239,464,494.32
  5. Step 5: Solve for x
    x = 239,464,494.32/21,331.50
  6. Step 6: Final answer
    x = 11,225.86

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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.