Home / 28,222.50-38,948.40-15,647.25

Finding the Fourth Proportional to 28,222.50, 38,948.40 and 15,647.25

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Solution

The fourth proportional to 28,222.50, 38,948.40 and 15,647.25 is: 21,593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,222.50 : 38,948.40 = 15,647.25 : x
  2. Step 2: Convert to fraction form
    28,222.50/38,948.40 = 15,647.25/x
  3. Step 3: Cross multiply
    28,222.50x = 38,948.40 × 15,647.25
  4. Step 4: Simplify right side
    28,222.50x = 609,435,351.90
  5. Step 5: Solve for x
    x = 609,435,351.90/28,222.50
  6. Step 6: Final answer
    x = 21,593.95

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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.