Home / 8,715.87-12,028.95-5,179.08

Finding the Fourth Proportional to 8,715.87, 12,028.95 and 5,179.08

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Solution

The fourth proportional to 8,715.87, 12,028.95 and 5,179.08 is: 7,147.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.87 : 12,028.95 = 5,179.08 : x
  2. Step 2: Convert to fraction form
    8,715.87/12,028.95 = 5,179.08/x
  3. Step 3: Cross multiply
    8,715.87x = 12,028.95 × 5,179.08
  4. Step 4: Simplify right side
    8,715.87x = 62,298,894.37
  5. Step 5: Solve for x
    x = 62,298,894.37/8,715.87
  6. Step 6: Final answer
    x = 7,147.75

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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.