Home / 20,616.49-28,451.45-12,118.49

Finding the Fourth Proportional to 20,616.49, 28,451.45 and 12,118.49

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Solution

The fourth proportional to 20,616.49, 28,451.45 and 12,118.49 is: 16,723.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.49 : 28,451.45 = 12,118.49 : x
  2. Step 2: Convert to fraction form
    20,616.49/28,451.45 = 12,118.49/x
  3. Step 3: Cross multiply
    20,616.49x = 28,451.45 × 12,118.49
  4. Step 4: Simplify right side
    20,616.49x = 344,788,551.72
  5. Step 5: Solve for x
    x = 344,788,551.72/20,616.49
  6. Step 6: Final answer
    x = 16,723.93

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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.