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Finding the Fourth Proportional to 21,199.65, 29,256.90 and 12,247.53

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Solution

The fourth proportional to 21,199.65, 29,256.90 and 12,247.53 is: 16,902.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.65 : 29,256.90 = 12,247.53 : x
  2. Step 2: Convert to fraction form
    21,199.65/29,256.90 = 12,247.53/x
  3. Step 3: Cross multiply
    21,199.65x = 29,256.90 × 12,247.53
  4. Step 4: Simplify right side
    21,199.65x = 358,324,760.46
  5. Step 5: Solve for x
    x = 358,324,760.46/21,199.65
  6. Step 6: Final answer
    x = 16,902.39

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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.