Home / 28,428.48-39,227.40-15,850.80

Finding the Fourth Proportional to 28,428.48, 39,227.40 and 15,850.80

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Solution

The fourth proportional to 28,428.48, 39,227.40 and 15,850.80 is: 21,871.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.48 : 39,227.40 = 15,850.80 : x
  2. Step 2: Convert to fraction form
    28,428.48/39,227.40 = 15,850.80/x
  3. Step 3: Cross multiply
    28,428.48x = 39,227.40 × 15,850.80
  4. Step 4: Simplify right side
    28,428.48x = 621,785,671.92
  5. Step 5: Solve for x
    x = 621,785,671.92/28,428.48
  6. Step 6: Final answer
    x = 21,871.93

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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.