Home / 20,689.82-28,566.24-19,367.90

Finding the Fourth Proportional to 20,689.82, 28,566.24 and 19,367.90

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Solution

The fourth proportional to 20,689.82, 28,566.24 and 19,367.90 is: 26,741.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.82 : 28,566.24 = 19,367.90 : x
  2. Step 2: Convert to fraction form
    20,689.82/28,566.24 = 19,367.90/x
  3. Step 3: Cross multiply
    20,689.82x = 28,566.24 × 19,367.90
  4. Step 4: Simplify right side
    20,689.82x = 553,268,079.70
  5. Step 5: Solve for x
    x = 553,268,079.70/20,689.82
  6. Step 6: Final answer
    x = 26,741.08

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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.