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Finding the Fourth Proportional to 6,666.71, 9,990.95 and 3,894.08

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Solution

The fourth proportional to 6,666.71, 9,990.95 and 3,894.08 is: 5,835.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.71 : 9,990.95 = 3,894.08 : x
  2. Step 2: Convert to fraction form
    6,666.71/9,990.95 = 3,894.08/x
  3. Step 3: Cross multiply
    6,666.71x = 9,990.95 × 3,894.08
  4. Step 4: Simplify right side
    6,666.71x = 38,905,489.15
  5. Step 5: Solve for x
    x = 38,905,489.15/6,666.71
  6. Step 6: Final answer
    x = 5,835.79

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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.