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Finding the Fourth Proportional to 18,984.32, 28,477.23 and 7,136.90

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Solution

The fourth proportional to 18,984.32, 28,477.23 and 7,136.90 is: 10,705.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.32 : 28,477.23 = 7,136.90 : x
  2. Step 2: Convert to fraction form
    18,984.32/28,477.23 = 7,136.90/x
  3. Step 3: Cross multiply
    18,984.32x = 28,477.23 × 7,136.90
  4. Step 4: Simplify right side
    18,984.32x = 203,239,142.79
  5. Step 5: Solve for x
    x = 203,239,142.79/18,984.32
  6. Step 6: Final answer
    x = 10,705.63

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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.