Home / 20,568.91-28,394.95-13,018.90

Finding the Fourth Proportional to 20,568.91, 28,394.95 and 13,018.90

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Solution

The fourth proportional to 20,568.91, 28,394.95 and 13,018.90 is: 17,972.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.91 : 28,394.95 = 13,018.90 : x
  2. Step 2: Convert to fraction form
    20,568.91/28,394.95 = 13,018.90/x
  3. Step 3: Cross multiply
    20,568.91x = 28,394.95 × 13,018.90
  4. Step 4: Simplify right side
    20,568.91x = 369,670,872.58
  5. Step 5: Solve for x
    x = 369,670,872.58/20,568.91
  6. Step 6: Final answer
    x = 17,972.32

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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.