Home / 20,488.98-28,274.76-11,536.05

Finding the Fourth Proportional to 20,488.98, 28,274.76 and 11,536.05

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Solution

The fourth proportional to 20,488.98, 28,274.76 and 11,536.05 is: 15,919.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.98 : 28,274.76 = 11,536.05 : x
  2. Step 2: Convert to fraction form
    20,488.98/28,274.76 = 11,536.05/x
  3. Step 3: Cross multiply
    20,488.98x = 28,274.76 × 11,536.05
  4. Step 4: Simplify right side
    20,488.98x = 326,179,045.10
  5. Step 5: Solve for x
    x = 326,179,045.10/20,488.98
  6. Step 6: Final answer
    x = 15,919.73

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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.