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Finding the Fourth Proportional to 7,122.96, 9,826.11 and 4,289.04

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Solution

The fourth proportional to 7,122.96, 9,826.11 and 4,289.04 is: 5,916.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.96 : 9,826.11 = 4,289.04 : x
  2. Step 2: Convert to fraction form
    7,122.96/9,826.11 = 4,289.04/x
  3. Step 3: Cross multiply
    7,122.96x = 9,826.11 × 4,289.04
  4. Step 4: Simplify right side
    7,122.96x = 42,144,578.83
  5. Step 5: Solve for x
    x = 42,144,578.83/7,122.96
  6. Step 6: Final answer
    x = 5,916.72

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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.