Home / 20,761.79-28,652.21-11,690.27

Finding the Fourth Proportional to 20,761.79, 28,652.21 and 11,690.27

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Solution

The fourth proportional to 20,761.79, 28,652.21 and 11,690.27 is: 16,133.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.79 : 28,652.21 = 11,690.27 : x
  2. Step 2: Convert to fraction form
    20,761.79/28,652.21 = 11,690.27/x
  3. Step 3: Cross multiply
    20,761.79x = 28,652.21 × 11,690.27
  4. Step 4: Simplify right side
    20,761.79x = 334,952,165.30
  5. Step 5: Solve for x
    x = 334,952,165.30/20,761.79
  6. Step 6: Final answer
    x = 16,133.10

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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.