Home / 9,218-12,719.40-5,239.28

Finding the Fourth Proportional to 9,218, 12,719.40 and 5,239.28

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Solution

The fourth proportional to 9,218, 12,719.40 and 5,239.28 is: 7,229.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,218 : 12,719.40 = 5,239.28 : x
  2. Step 2: Convert to fraction form
    9,218/12,719.40 = 5,239.28/x
  3. Step 3: Cross multiply
    9,218x = 12,719.40 × 5,239.28
  4. Step 4: Simplify right side
    9,218x = 66,640,498.03
  5. Step 5: Solve for x
    x = 66,640,498.03/9,218
  6. Step 6: Final answer
    x = 7,229.39

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Double scale
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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.