Home / 9,218.09-12,720.95-5,239.20

Finding the Fourth Proportional to 9,218.09, 12,720.95 and 5,239.20

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Solution

The fourth proportional to 9,218.09, 12,720.95 and 5,239.20 is: 7,230.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,218.09 : 12,720.95 = 5,239.20 : x
  2. Step 2: Convert to fraction form
    9,218.09/12,720.95 = 5,239.20/x
  3. Step 3: Cross multiply
    9,218.09x = 12,720.95 × 5,239.20
  4. Step 4: Simplify right side
    9,218.09x = 66,647,575.04
  5. Step 5: Solve for x
    x = 66,647,575.04/9,218.09
  6. Step 6: Final answer
    x = 7,230.09

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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.