Home / 21,742.48-30,005.76-12,311.92

Finding the Fourth Proportional to 21,742.48, 30,005.76 and 12,311.92

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Solution

The fourth proportional to 21,742.48, 30,005.76 and 12,311.92 is: 16,991.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.48 : 30,005.76 = 12,311.92 : x
  2. Step 2: Convert to fraction form
    21,742.48/30,005.76 = 12,311.92/x
  3. Step 3: Cross multiply
    21,742.48x = 30,005.76 × 12,311.92
  4. Step 4: Simplify right side
    21,742.48x = 369,428,516.66
  5. Step 5: Solve for x
    x = 369,428,516.66/21,742.48
  6. Step 6: Final answer
    x = 16,991.09

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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.