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Finding the Fourth Proportional to 7,826.79, 10,800.97 and 4,289.99

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Solution

The fourth proportional to 7,826.79, 10,800.97 and 4,289.99 is: 5,920.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,826.79 : 10,800.97 = 4,289.99 : x
  2. Step 2: Convert to fraction form
    7,826.79/10,800.97 = 4,289.99/x
  3. Step 3: Cross multiply
    7,826.79x = 10,800.97 × 4,289.99
  4. Step 4: Simplify right side
    7,826.79x = 46,336,053.29
  5. Step 5: Solve for x
    x = 46,336,053.29/7,826.79
  6. Step 6: Final answer
    x = 5,920.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.