Home / 20,569.38-28,370.94-13,386

Finding the Fourth Proportional to 20,569.38, 28,370.94 and 13,386

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Solution

The fourth proportional to 20,569.38, 28,370.94 and 13,386 is: 18,463.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.38 : 28,370.94 = 13,386 : x
  2. Step 2: Convert to fraction form
    20,569.38/28,370.94 = 13,386/x
  3. Step 3: Cross multiply
    20,569.38x = 28,370.94 × 13,386
  4. Step 4: Simplify right side
    20,569.38x = 379,773,402.84
  5. Step 5: Solve for x
    x = 379,773,402.84/20,569.38
  6. Step 6: Final answer
    x = 18,463.05

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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.