Home / 28,115.75-38,800.56-15,369.63

Finding the Fourth Proportional to 28,115.75, 38,800.56 and 15,369.63

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Solution

The fourth proportional to 28,115.75, 38,800.56 and 15,369.63 is: 21,210.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.75 : 38,800.56 = 15,369.63 : x
  2. Step 2: Convert to fraction form
    28,115.75/38,800.56 = 15,369.63/x
  3. Step 3: Cross multiply
    28,115.75x = 38,800.56 × 15,369.63
  4. Step 4: Simplify right side
    28,115.75x = 596,350,250.99
  5. Step 5: Solve for x
    x = 596,350,250.99/28,115.75
  6. Step 6: Final answer
    x = 21,210.54

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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.