Home / 21,142.60-29,176.68-11,711.14

Finding the Fourth Proportional to 21,142.60, 29,176.68 and 11,711.14

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Solution

The fourth proportional to 21,142.60, 29,176.68 and 11,711.14 is: 16,161.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.60 : 29,176.68 = 11,711.14 : x
  2. Step 2: Convert to fraction form
    21,142.60/29,176.68 = 11,711.14/x
  3. Step 3: Cross multiply
    21,142.60x = 29,176.68 × 11,711.14
  4. Step 4: Simplify right side
    21,142.60x = 341,692,184.22
  5. Step 5: Solve for x
    x = 341,692,184.22/21,142.60
  6. Step 6: Final answer
    x = 16,161.31

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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.