Home / 19,916.40-29,835.72-12,105.84

Finding the Fourth Proportional to 19,916.40, 29,835.72 and 12,105.84

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Solution

The fourth proportional to 19,916.40, 29,835.72 and 12,105.84 is: 18,135.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,916.40 : 29,835.72 = 12,105.84 : x
  2. Step 2: Convert to fraction form
    19,916.40/29,835.72 = 12,105.84/x
  3. Step 3: Cross multiply
    19,916.40x = 29,835.72 × 12,105.84
  4. Step 4: Simplify right side
    19,916.40x = 361,186,452.60
  5. Step 5: Solve for x
    x = 361,186,452.60/19,916.40
  6. Step 6: Final answer
    x = 18,135.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.