Home / 28,553.12-39,405.12-15,978.80

Finding the Fourth Proportional to 28,553.12, 39,405.12 and 15,978.80

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Solution

The fourth proportional to 28,553.12, 39,405.12 and 15,978.80 is: 22,051.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,553.12 : 39,405.12 = 15,978.80 : x
  2. Step 2: Convert to fraction form
    28,553.12/39,405.12 = 15,978.80/x
  3. Step 3: Cross multiply
    28,553.12x = 39,405.12 × 15,978.80
  4. Step 4: Simplify right side
    28,553.12x = 629,646,531.46
  5. Step 5: Solve for x
    x = 629,646,531.46/28,553.12
  6. Step 6: Final answer
    x = 22,051.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.