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Finding the Fourth Proportional to 15,402.99, 21,256.17 and 8,329.41

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Solution

The fourth proportional to 15,402.99, 21,256.17 and 8,329.41 is: 11,494.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.99 : 21,256.17 = 8,329.41 : x
  2. Step 2: Convert to fraction form
    15,402.99/21,256.17 = 8,329.41/x
  3. Step 3: Cross multiply
    15,402.99x = 21,256.17 × 8,329.41
  4. Step 4: Simplify right side
    15,402.99x = 177,051,354.96
  5. Step 5: Solve for x
    x = 177,051,354.96/15,402.99
  6. Step 6: Final answer
    x = 11,494.61

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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.