Home / 21,251.88-29,325.70-11,820.68

Finding the Fourth Proportional to 21,251.88, 29,325.70 and 11,820.68

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Solution

The fourth proportional to 21,251.88, 29,325.70 and 11,820.68 is: 16,311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.88 : 29,325.70 = 11,820.68 : x
  2. Step 2: Convert to fraction form
    21,251.88/29,325.70 = 11,820.68/x
  3. Step 3: Cross multiply
    21,251.88x = 29,325.70 × 11,820.68
  4. Step 4: Simplify right side
    21,251.88x = 346,649,715.48
  5. Step 5: Solve for x
    x = 346,649,715.48/21,251.88
  6. Step 6: Final answer
    x = 16,311.48

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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.