Home / 20,682.74-28,548.29-12,187.61

Finding the Fourth Proportional to 20,682.74, 28,548.29 and 12,187.61

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Solution

The fourth proportional to 20,682.74, 28,548.29 and 12,187.61 is: 16,822.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.74 : 28,548.29 = 12,187.61 : x
  2. Step 2: Convert to fraction form
    20,682.74/28,548.29 = 12,187.61/x
  3. Step 3: Cross multiply
    20,682.74x = 28,548.29 × 12,187.61
  4. Step 4: Simplify right side
    20,682.74x = 347,935,221.01
  5. Step 5: Solve for x
    x = 347,935,221.01/20,682.74
  6. Step 6: Final answer
    x = 16,822.50

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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.