Home / 28,321.02-39,084.12-15,745.50

Finding the Fourth Proportional to 28,321.02, 39,084.12 and 15,745.50

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Solution

The fourth proportional to 28,321.02, 39,084.12 and 15,745.50 is: 21,729.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,321.02 : 39,084.12 = 15,745.50 : x
  2. Step 2: Convert to fraction form
    28,321.02/39,084.12 = 15,745.50/x
  3. Step 3: Cross multiply
    28,321.02x = 39,084.12 × 15,745.50
  4. Step 4: Simplify right side
    28,321.02x = 615,399,011.46
  5. Step 5: Solve for x
    x = 615,399,011.46/28,321.02
  6. Step 6: Final answer
    x = 21,729.41

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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.