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Finding the Fourth Proportional to 19,687.22, 29,311.23 and 19,411.46

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Solution

The fourth proportional to 19,687.22, 29,311.23 and 19,411.46 is: 28,900.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,687.22 : 29,311.23 = 19,411.46 : x
  2. Step 2: Convert to fraction form
    19,687.22/29,311.23 = 19,411.46/x
  3. Step 3: Cross multiply
    19,687.22x = 29,311.23 × 19,411.46
  4. Step 4: Simplify right side
    19,687.22x = 568,973,671.64
  5. Step 5: Solve for x
    x = 568,973,671.64/19,687.22
  6. Step 6: Final answer
    x = 28,900.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.