Home / 10,083.78-15,115.95-5,155.74

Finding the Fourth Proportional to 10,083.78, 15,115.95 and 5,155.74

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Solution

The fourth proportional to 10,083.78, 15,115.95 and 5,155.74 is: 7,728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,083.78 : 15,115.95 = 5,155.74 : x
  2. Step 2: Convert to fraction form
    10,083.78/15,115.95 = 5,155.74/x
  3. Step 3: Cross multiply
    10,083.78x = 15,115.95 × 5,155.74
  4. Step 4: Simplify right side
    10,083.78x = 77,933,908.05
  5. Step 5: Solve for x
    x = 77,933,908.05/10,083.78
  6. Step 6: Final answer
    x = 7,728.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.