Home / 21,620.24-29,833.80-12,190.40

Finding the Fourth Proportional to 21,620.24, 29,833.80 and 12,190.40

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Solution

The fourth proportional to 21,620.24, 29,833.80 and 12,190.40 is: 16,821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.24 : 29,833.80 = 12,190.40 : x
  2. Step 2: Convert to fraction form
    21,620.24/29,833.80 = 12,190.40/x
  3. Step 3: Cross multiply
    21,620.24x = 29,833.80 × 12,190.40
  4. Step 4: Simplify right side
    21,620.24x = 363,685,955.52
  5. Step 5: Solve for x
    x = 363,685,955.52/21,620.24
  6. Step 6: Final answer
    x = 16,821.55

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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.