Home / 7,780.76-11,664.59-3,618.64

Finding the Fourth Proportional to 7,780.76, 11,664.59 and 3,618.64

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Solution

The fourth proportional to 7,780.76, 11,664.59 and 3,618.64 is: 5,424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.76 : 11,664.59 = 3,618.64 : x
  2. Step 2: Convert to fraction form
    7,780.76/11,664.59 = 3,618.64/x
  3. Step 3: Cross multiply
    7,780.76x = 11,664.59 × 3,618.64
  4. Step 4: Simplify right side
    7,780.76x = 42,209,904.70
  5. Step 5: Solve for x
    x = 42,209,904.70/7,780.76
  6. Step 6: Final answer
    x = 5,424.91

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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.