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Finding the Fourth Proportional to 7,866.95, 11,800.45 and 3,187.05

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Solution

The fourth proportional to 7,866.95, 11,800.45 and 3,187.05 is: 4,780.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,866.95 : 11,800.45 = 3,187.05 : x
  2. Step 2: Convert to fraction form
    7,866.95/11,800.45 = 3,187.05/x
  3. Step 3: Cross multiply
    7,866.95x = 11,800.45 × 3,187.05
  4. Step 4: Simplify right side
    7,866.95x = 37,608,582.51
  5. Step 5: Solve for x
    x = 37,608,582.51/7,866.95
  6. Step 6: Final answer
    x = 4,780.58

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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.