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Finding the Fourth Proportional to 6,139.79, 9,212.40 and 3,217.40

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Solution

The fourth proportional to 6,139.79, 9,212.40 and 3,217.40 is: 4,827.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.79 : 9,212.40 = 3,217.40 : x
  2. Step 2: Convert to fraction form
    6,139.79/9,212.40 = 3,217.40/x
  3. Step 3: Cross multiply
    6,139.79x = 9,212.40 × 3,217.40
  4. Step 4: Simplify right side
    6,139.79x = 29,639,929.70
  5. Step 5: Solve for x
    x = 29,639,929.70/6,139.79
  6. Step 6: Final answer
    x = 4,827.52

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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.