Home / 20,396.91-28,146.79-12,332.55

Finding the Fourth Proportional to 20,396.91, 28,146.79 and 12,332.55

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Solution

The fourth proportional to 20,396.91, 28,146.79 and 12,332.55 is: 17,018.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.91 : 28,146.79 = 12,332.55 : x
  2. Step 2: Convert to fraction form
    20,396.91/28,146.79 = 12,332.55/x
  3. Step 3: Cross multiply
    20,396.91x = 28,146.79 × 12,332.55
  4. Step 4: Simplify right side
    20,396.91x = 347,121,815.98
  5. Step 5: Solve for x
    x = 347,121,815.98/20,396.91
  6. Step 6: Final answer
    x = 17,018.35

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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.