Home / 28,428.75-39,231.68-15,853.23

Finding the Fourth Proportional to 28,428.75, 39,231.68 and 15,853.23

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Solution

The fourth proportional to 28,428.75, 39,231.68 and 15,853.23 is: 21,877.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.75 : 39,231.68 = 15,853.23 : x
  2. Step 2: Convert to fraction form
    28,428.75/39,231.68 = 15,853.23/x
  3. Step 3: Cross multiply
    28,428.75x = 39,231.68 × 15,853.23
  4. Step 4: Simplify right side
    28,428.75x = 621,948,767.06
  5. Step 5: Solve for x
    x = 621,948,767.06/28,428.75
  6. Step 6: Final answer
    x = 21,877.46

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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.