Home / 20,718.44-28,590.90-11,286.44

Finding the Fourth Proportional to 20,718.44, 28,590.90 and 11,286.44

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Solution

The fourth proportional to 20,718.44, 28,590.90 and 11,286.44 is: 15,574.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.44 : 28,590.90 = 11,286.44 : x
  2. Step 2: Convert to fraction form
    20,718.44/28,590.90 = 11,286.44/x
  3. Step 3: Cross multiply
    20,718.44x = 28,590.90 × 11,286.44
  4. Step 4: Simplify right side
    20,718.44x = 322,689,477.40
  5. Step 5: Solve for x
    x = 322,689,477.40/20,718.44
  6. Step 6: Final answer
    x = 15,574.99

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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.