Home / 20,520.16-28,365.64-18,304

Finding the Fourth Proportional to 20,520.16, 28,365.64 and 18,304

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Solution

The fourth proportional to 20,520.16, 28,365.64 and 18,304 is: 25,302.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.16 : 28,365.64 = 18,304 : x
  2. Step 2: Convert to fraction form
    20,520.16/28,365.64 = 18,304/x
  3. Step 3: Cross multiply
    20,520.16x = 28,365.64 × 18,304
  4. Step 4: Simplify right side
    20,520.16x = 519,204,674.56
  5. Step 5: Solve for x
    x = 519,204,674.56/20,520.16
  6. Step 6: Final answer
    x = 25,302.17

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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.