Home / 20,516.82-28,430.16-19,268.34

Finding the Fourth Proportional to 20,516.82, 28,430.16 and 19,268.34

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Solution

The fourth proportional to 20,516.82, 28,430.16 and 19,268.34 is: 26,700.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.82 : 28,430.16 = 19,268.34 : x
  2. Step 2: Convert to fraction form
    20,516.82/28,430.16 = 19,268.34/x
  3. Step 3: Cross multiply
    20,516.82x = 28,430.16 × 19,268.34
  4. Step 4: Simplify right side
    20,516.82x = 547,801,989.13
  5. Step 5: Solve for x
    x = 547,801,989.13/20,516.82
  6. Step 6: Final answer
    x = 26,700.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.