Home / 13,215.78-18,237.36-7,247.34

Finding the Fourth Proportional to 13,215.78, 18,237.36 and 7,247.34

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Solution

The fourth proportional to 13,215.78, 18,237.36 and 7,247.34 is: 10,001.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.78 : 18,237.36 = 7,247.34 : x
  2. Step 2: Convert to fraction form
    13,215.78/18,237.36 = 7,247.34/x
  3. Step 3: Cross multiply
    13,215.78x = 18,237.36 × 7,247.34
  4. Step 4: Simplify right side
    13,215.78x = 132,172,348.62
  5. Step 5: Solve for x
    x = 132,172,348.62/13,215.78
  6. Step 6: Final answer
    x = 10,001.10

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Double scale
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Similar ratio
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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.