Home / 15,321.54-21,143.80-8,609.48

Finding the Fourth Proportional to 15,321.54, 21,143.80 and 8,609.48

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Solution

The fourth proportional to 15,321.54, 21,143.80 and 8,609.48 is: 11,881.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.54 : 21,143.80 = 8,609.48 : x
  2. Step 2: Convert to fraction form
    15,321.54/21,143.80 = 8,609.48/x
  3. Step 3: Cross multiply
    15,321.54x = 21,143.80 × 8,609.48
  4. Step 4: Simplify right side
    15,321.54x = 182,037,123.22
  5. Step 5: Solve for x
    x = 182,037,123.22/15,321.54
  6. Step 6: Final answer
    x = 11,881.12

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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.