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Finding the Fourth Proportional to 20,737.58, 28,624.14 and 19,679.72

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Solution

The fourth proportional to 20,737.58, 28,624.14 and 19,679.72 is: 27,163.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,737.58 : 28,624.14 = 19,679.72 : x
  2. Step 2: Convert to fraction form
    20,737.58/28,624.14 = 19,679.72/x
  3. Step 3: Cross multiply
    20,737.58x = 28,624.14 × 19,679.72
  4. Step 4: Simplify right side
    20,737.58x = 563,315,060.44
  5. Step 5: Solve for x
    x = 563,315,060.44/20,737.58
  6. Step 6: Final answer
    x = 27,163.97

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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.