Home / 7,680.63-11,520.87-3,519.46

Finding the Fourth Proportional to 7,680.63, 11,520.87 and 3,519.46

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Solution

The fourth proportional to 7,680.63, 11,520.87 and 3,519.46 is: 5,279.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.63 : 11,520.87 = 3,519.46 : x
  2. Step 2: Convert to fraction form
    7,680.63/11,520.87 = 3,519.46/x
  3. Step 3: Cross multiply
    7,680.63x = 11,520.87 × 3,519.46
  4. Step 4: Simplify right side
    7,680.63x = 40,547,212.33
  5. Step 5: Solve for x
    x = 40,547,212.33/7,680.63
  6. Step 6: Final answer
    x = 5,279.15

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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.