Home / 20,690.82-28,567.62-19,368.90

Finding the Fourth Proportional to 20,690.82, 28,567.62 and 19,368.90

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Solution

The fourth proportional to 20,690.82, 28,567.62 and 19,368.90 is: 26,742.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.82 : 28,567.62 = 19,368.90 : x
  2. Step 2: Convert to fraction form
    20,690.82/28,567.62 = 19,368.90/x
  3. Step 3: Cross multiply
    20,690.82x = 28,567.62 × 19,368.90
  4. Step 4: Simplify right side
    20,690.82x = 553,323,375.02
  5. Step 5: Solve for x
    x = 553,323,375.02/20,690.82
  6. Step 6: Final answer
    x = 26,742.46

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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.