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Finding the Fourth Proportional to 7,980.03, 11,970.17 and 2,785.91

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Solution

The fourth proportional to 7,980.03, 11,970.17 and 2,785.91 is: 4,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.03 : 11,970.17 = 2,785.91 : x
  2. Step 2: Convert to fraction form
    7,980.03/11,970.17 = 2,785.91/x
  3. Step 3: Cross multiply
    7,980.03x = 11,970.17 × 2,785.91
  4. Step 4: Simplify right side
    7,980.03x = 33,347,742.52
  5. Step 5: Solve for x
    x = 33,347,742.52/7,980.03
  6. Step 6: Final answer
    x = 4,178.90

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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.