Home / 20,240.16-27,920.88-13,518.24

Finding the Fourth Proportional to 20,240.16, 27,920.88 and 13,518.24

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Solution

The fourth proportional to 20,240.16, 27,920.88 and 13,518.24 is: 18,648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.16 : 27,920.88 = 13,518.24 : x
  2. Step 2: Convert to fraction form
    20,240.16/27,920.88 = 13,518.24/x
  3. Step 3: Cross multiply
    20,240.16x = 27,920.88 × 13,518.24
  4. Step 4: Simplify right side
    20,240.16x = 377,441,156.85
  5. Step 5: Solve for x
    x = 377,441,156.85/20,240.16
  6. Step 6: Final answer
    x = 18,648.13

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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.