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Finding the Fourth Proportional to 6,665.76, 9,999.95 and 5,577.71

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Solution

The fourth proportional to 6,665.76, 9,999.95 and 5,577.71 is: 8,367.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.76 : 9,999.95 = 5,577.71 : x
  2. Step 2: Convert to fraction form
    6,665.76/9,999.95 = 5,577.71/x
  3. Step 3: Cross multiply
    6,665.76x = 9,999.95 × 5,577.71
  4. Step 4: Simplify right side
    6,665.76x = 55,776,743.23
  5. Step 5: Solve for x
    x = 55,776,743.23/6,665.76
  6. Step 6: Final answer
    x = 8,367.65

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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.