Home / 28,318.02-39,078.01-15,571.21

Finding the Fourth Proportional to 28,318.02, 39,078.01 and 15,571.21

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Solution

The fourth proportional to 28,318.02, 39,078.01 and 15,571.21 is: 21,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.02 : 39,078.01 = 15,571.21 : x
  2. Step 2: Convert to fraction form
    28,318.02/39,078.01 = 15,571.21/x
  3. Step 3: Cross multiply
    28,318.02x = 39,078.01 × 15,571.21
  4. Step 4: Simplify right side
    28,318.02x = 608,491,900.09
  5. Step 5: Solve for x
    x = 608,491,900.09/28,318.02
  6. Step 6: Final answer
    x = 21,487.80

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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.