Home / 7,107.12-9,807.68-4,122.89

Finding the Fourth Proportional to 7,107.12, 9,807.68 and 4,122.89

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Solution

The fourth proportional to 7,107.12, 9,807.68 and 4,122.89 is: 5,689.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,107.12 : 9,807.68 = 4,122.89 : x
  2. Step 2: Convert to fraction form
    7,107.12/9,807.68 = 4,122.89/x
  3. Step 3: Cross multiply
    7,107.12x = 9,807.68 × 4,122.89
  4. Step 4: Simplify right side
    7,107.12x = 40,435,916.14
  5. Step 5: Solve for x
    x = 40,435,916.14/7,107.12
  6. Step 6: Final answer
    x = 5,689.49

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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.