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Finding the Fourth Proportional to 21,751.10, 32,641.24 and 7,900.10

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Solution

The fourth proportional to 21,751.10, 32,641.24 and 7,900.10 is: 11,855.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.10 : 32,641.24 = 7,900.10 : x
  2. Step 2: Convert to fraction form
    21,751.10/32,641.24 = 7,900.10/x
  3. Step 3: Cross multiply
    21,751.10x = 32,641.24 × 7,900.10
  4. Step 4: Simplify right side
    21,751.10x = 257,869,060.12
  5. Step 5: Solve for x
    x = 257,869,060.12/21,751.10
  6. Step 6: Final answer
    x = 11,855.45

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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.