Home / 20,821.24-28,726.24-11,862.40

Finding the Fourth Proportional to 20,821.24, 28,726.24 and 11,862.40

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Solution

The fourth proportional to 20,821.24, 28,726.24 and 11,862.40 is: 16,366.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.24 : 28,726.24 = 11,862.40 : x
  2. Step 2: Convert to fraction form
    20,821.24/28,726.24 = 11,862.40/x
  3. Step 3: Cross multiply
    20,821.24x = 28,726.24 × 11,862.40
  4. Step 4: Simplify right side
    20,821.24x = 340,762,149.38
  5. Step 5: Solve for x
    x = 340,762,149.38/20,821.24
  6. Step 6: Final answer
    x = 16,366.08

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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.