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Finding the Fourth Proportional to 13,998.92, 21,000.45 and 4,136.92

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Solution

The fourth proportional to 13,998.92, 21,000.45 and 4,136.92 is: 6,205.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.92 : 21,000.45 = 4,136.92 : x
  2. Step 2: Convert to fraction form
    13,998.92/21,000.45 = 4,136.92/x
  3. Step 3: Cross multiply
    13,998.92x = 21,000.45 × 4,136.92
  4. Step 4: Simplify right side
    13,998.92x = 86,877,181.61
  5. Step 5: Solve for x
    x = 86,877,181.61/13,998.92
  6. Step 6: Final answer
    x = 6,205.99

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Double scale
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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.