Home / 15,358.48-21,195.81-8,644.78

Finding the Fourth Proportional to 15,358.48, 21,195.81 and 8,644.78

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Solution

The fourth proportional to 15,358.48, 21,195.81 and 8,644.78 is: 11,930.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,358.48 : 21,195.81 = 8,644.78 : x
  2. Step 2: Convert to fraction form
    15,358.48/21,195.81 = 8,644.78/x
  3. Step 3: Cross multiply
    15,358.48x = 21,195.81 × 8,644.78
  4. Step 4: Simplify right side
    15,358.48x = 183,233,114.37
  5. Step 5: Solve for x
    x = 183,233,114.37/15,358.48
  6. Step 6: Final answer
    x = 11,930.42

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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.