Home / 7,680.56-11,511.36-3,980.66

Finding the Fourth Proportional to 7,680.56, 11,511.36 and 3,980.66

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Solution

The fourth proportional to 7,680.56, 11,511.36 and 3,980.66 is: 5,966.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,680.56 : 11,511.36 = 3,980.66 : x
  2. Step 2: Convert to fraction form
    7,680.56/11,511.36 = 3,980.66/x
  3. Step 3: Cross multiply
    7,680.56x = 11,511.36 × 3,980.66
  4. Step 4: Simplify right side
    7,680.56x = 45,822,752.74
  5. Step 5: Solve for x
    x = 45,822,752.74/7,680.56
  6. Step 6: Final answer
    x = 5,966.07

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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.