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Finding the Fourth Proportional to 21,757.47, 32,649.15 and 7,907.55

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Solution

The fourth proportional to 21,757.47, 32,649.15 and 7,907.55 is: 11,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,757.47 : 32,649.15 = 7,907.55 : x
  2. Step 2: Convert to fraction form
    21,757.47/32,649.15 = 7,907.55/x
  3. Step 3: Cross multiply
    21,757.47x = 32,649.15 × 7,907.55
  4. Step 4: Simplify right side
    21,757.47x = 258,174,786.08
  5. Step 5: Solve for x
    x = 258,174,786.08/21,757.47
  6. Step 6: Final answer
    x = 11,866.03

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1.5x scale

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.