Home / 28,380.07-39,164.02-15,634.46

Finding the Fourth Proportional to 28,380.07, 39,164.02 and 15,634.46

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Solution

The fourth proportional to 28,380.07, 39,164.02 and 15,634.46 is: 21,575.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.07 : 39,164.02 = 15,634.46 : x
  2. Step 2: Convert to fraction form
    28,380.07/39,164.02 = 15,634.46/x
  3. Step 3: Cross multiply
    28,380.07x = 39,164.02 × 15,634.46
  4. Step 4: Simplify right side
    28,380.07x = 612,308,304.13
  5. Step 5: Solve for x
    x = 612,308,304.13/28,380.07
  6. Step 6: Final answer
    x = 21,575.29

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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.