Home / 20,393.89-28,143.63-11,901.85

Finding the Fourth Proportional to 20,393.89, 28,143.63 and 11,901.85

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Solution

The fourth proportional to 20,393.89, 28,143.63 and 11,901.85 is: 16,424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.89 : 28,143.63 = 11,901.85 : x
  2. Step 2: Convert to fraction form
    20,393.89/28,143.63 = 11,901.85/x
  3. Step 3: Cross multiply
    20,393.89x = 28,143.63 × 11,901.85
  4. Step 4: Simplify right side
    20,393.89x = 334,961,262.72
  5. Step 5: Solve for x
    x = 334,961,262.72/20,393.89
  6. Step 6: Final answer
    x = 16,424.59

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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.