Home / 21,143.42-29,176.80-11,711.36

Finding the Fourth Proportional to 21,143.42, 29,176.80 and 11,711.36

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Solution

The fourth proportional to 21,143.42, 29,176.80 and 11,711.36 is: 16,161.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.42 : 29,176.80 = 11,711.36 : x
  2. Step 2: Convert to fraction form
    21,143.42/29,176.80 = 11,711.36/x
  3. Step 3: Cross multiply
    21,143.42x = 29,176.80 × 11,711.36
  4. Step 4: Simplify right side
    21,143.42x = 341,700,008.45
  5. Step 5: Solve for x
    x = 341,700,008.45/21,143.42
  6. Step 6: Final answer
    x = 16,161.06

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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.