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Finding the Fourth Proportional to 20,487.99, 28,239.44 and 14,511.99

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Solution

The fourth proportional to 20,487.99, 28,239.44 and 14,511.99 is: 20,002.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.99 : 28,239.44 = 14,511.99 : x
  2. Step 2: Convert to fraction form
    20,487.99/28,239.44 = 14,511.99/x
  3. Step 3: Cross multiply
    20,487.99x = 28,239.44 × 14,511.99
  4. Step 4: Simplify right side
    20,487.99x = 409,810,398.33
  5. Step 5: Solve for x
    x = 409,810,398.33/20,487.99
  6. Step 6: Final answer
    x = 20,002.47

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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.