Home / 7,746.80-11,620.20-3,128.72

Finding the Fourth Proportional to 7,746.80, 11,620.20 and 3,128.72

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Solution

The fourth proportional to 7,746.80, 11,620.20 and 3,128.72 is: 4,693.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,746.80 : 11,620.20 = 3,128.72 : x
  2. Step 2: Convert to fraction form
    7,746.80/11,620.20 = 3,128.72/x
  3. Step 3: Cross multiply
    7,746.80x = 11,620.20 × 3,128.72
  4. Step 4: Simplify right side
    7,746.80x = 36,356,352.14
  5. Step 5: Solve for x
    x = 36,356,352.14/7,746.80
  6. Step 6: Final answer
    x = 4,693.08

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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.