Home / 21,530.75-29,711.61-11,971.22

Finding the Fourth Proportional to 21,530.75, 29,711.61 and 11,971.22

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Solution

The fourth proportional to 21,530.75, 29,711.61 and 11,971.22 is: 16,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.75 : 29,711.61 = 11,971.22 : x
  2. Step 2: Convert to fraction form
    21,530.75/29,711.61 = 11,971.22/x
  3. Step 3: Cross multiply
    21,530.75x = 29,711.61 × 11,971.22
  4. Step 4: Simplify right side
    21,530.75x = 355,684,219.86
  5. Step 5: Solve for x
    x = 355,684,219.86/21,530.75
  6. Step 6: Final answer
    x = 16,519.82

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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.