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Finding the Fourth Proportional to 18,737.76, 28,106.52 and 7,644.24

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Solution

The fourth proportional to 18,737.76, 28,106.52 and 7,644.24 is: 11,466.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.76 : 28,106.52 = 7,644.24 : x
  2. Step 2: Convert to fraction form
    18,737.76/28,106.52 = 7,644.24/x
  3. Step 3: Cross multiply
    18,737.76x = 28,106.52 × 7,644.24
  4. Step 4: Simplify right side
    18,737.76x = 214,852,984.44
  5. Step 5: Solve for x
    x = 214,852,984.44/18,737.76
  6. Step 6: Final answer
    x = 11,466.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.