Home / 21,240.77-29,311.88-11,809.13

Finding the Fourth Proportional to 21,240.77, 29,311.88 and 11,809.13

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Solution

The fourth proportional to 21,240.77, 29,311.88 and 11,809.13 is: 16,296.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.77 : 29,311.88 = 11,809.13 : x
  2. Step 2: Convert to fraction form
    21,240.77/29,311.88 = 11,809.13/x
  3. Step 3: Cross multiply
    21,240.77x = 29,311.88 × 11,809.13
  4. Step 4: Simplify right side
    21,240.77x = 346,147,595.86
  5. Step 5: Solve for x
    x = 346,147,595.86/21,240.77
  6. Step 6: Final answer
    x = 16,296.38

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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.