Home / 15,739.92-21,729.12-12,146.81

Finding the Fourth Proportional to 15,739.92, 21,729.12 and 12,146.81

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Solution

The fourth proportional to 15,739.92, 21,729.12 and 12,146.81 is: 16,768.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,739.92 : 21,729.12 = 12,146.81 : x
  2. Step 2: Convert to fraction form
    15,739.92/21,729.12 = 12,146.81/x
  3. Step 3: Cross multiply
    15,739.92x = 21,729.12 × 12,146.81
  4. Step 4: Simplify right side
    15,739.92x = 263,939,337.91
  5. Step 5: Solve for x
    x = 263,939,337.91/15,739.92
  6. Step 6: Final answer
    x = 16,768.79

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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.