Home / 7,085.94-10,612.68-3,390.78

Finding the Fourth Proportional to 7,085.94, 10,612.68 and 3,390.78

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Solution

The fourth proportional to 7,085.94, 10,612.68 and 3,390.78 is: 5,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.94 : 10,612.68 = 3,390.78 : x
  2. Step 2: Convert to fraction form
    7,085.94/10,612.68 = 3,390.78/x
  3. Step 3: Cross multiply
    7,085.94x = 10,612.68 × 3,390.78
  4. Step 4: Simplify right side
    7,085.94x = 35,985,263.09
  5. Step 5: Solve for x
    x = 35,985,263.09/7,085.94
  6. Step 6: Final answer
    x = 5,078.40

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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.