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Finding the Fourth Proportional to 20,999.98, 28,984.17 and 12,053.53

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Solution

The fourth proportional to 20,999.98, 28,984.17 and 12,053.53 is: 16,636.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.98 : 28,984.17 = 12,053.53 : x
  2. Step 2: Convert to fraction form
    20,999.98/28,984.17 = 12,053.53/x
  3. Step 3: Cross multiply
    20,999.98x = 28,984.17 × 12,053.53
  4. Step 4: Simplify right side
    20,999.98x = 349,361,562.62
  5. Step 5: Solve for x
    x = 349,361,562.62/20,999.98
  6. Step 6: Final answer
    x = 16,636.28

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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.