Home / 20,997.57-28,975.77-12,038.88

Finding the Fourth Proportional to 20,997.57, 28,975.77 and 12,038.88

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Solution

The fourth proportional to 20,997.57, 28,975.77 and 12,038.88 is: 16,613.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.57 : 28,975.77 = 12,038.88 : x
  2. Step 2: Convert to fraction form
    20,997.57/28,975.77 = 12,038.88/x
  3. Step 3: Cross multiply
    20,997.57x = 28,975.77 × 12,038.88
  4. Step 4: Simplify right side
    20,997.57x = 348,835,817.94
  5. Step 5: Solve for x
    x = 348,835,817.94/20,997.57
  6. Step 6: Final answer
    x = 16,613.15

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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.