Home / 9,122.69-12,589.20-5,145.09

Finding the Fourth Proportional to 9,122.69, 12,589.20 and 5,145.09

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Solution

The fourth proportional to 9,122.69, 12,589.20 and 5,145.09 is: 7,100.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,122.69 : 12,589.20 = 5,145.09 : x
  2. Step 2: Convert to fraction form
    9,122.69/12,589.20 = 5,145.09/x
  3. Step 3: Cross multiply
    9,122.69x = 12,589.20 × 5,145.09
  4. Step 4: Simplify right side
    9,122.69x = 64,772,567.03
  5. Step 5: Solve for x
    x = 64,772,567.03/9,122.69
  6. Step 6: Final answer
    x = 7,100.16

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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.