Home / 20,818.88-28,733.28-11,866.40

Finding the Fourth Proportional to 20,818.88, 28,733.28 and 11,866.40

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Solution

The fourth proportional to 20,818.88, 28,733.28 and 11,866.40 is: 16,377.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.88 : 28,733.28 = 11,866.40 : x
  2. Step 2: Convert to fraction form
    20,818.88/28,733.28 = 11,866.40/x
  3. Step 3: Cross multiply
    20,818.88x = 28,733.28 × 11,866.40
  4. Step 4: Simplify right side
    20,818.88x = 340,960,593.79
  5. Step 5: Solve for x
    x = 340,960,593.79/20,818.88
  6. Step 6: Final answer
    x = 16,377.47

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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.