Home / 20,484.61-28,276.41-11,989.42

Finding the Fourth Proportional to 20,484.61, 28,276.41 and 11,989.42

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Solution

The fourth proportional to 20,484.61, 28,276.41 and 11,989.42 is: 16,549.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,484.61 : 28,276.41 = 11,989.42 : x
  2. Step 2: Convert to fraction form
    20,484.61/28,276.41 = 11,989.42/x
  3. Step 3: Cross multiply
    20,484.61x = 28,276.41 × 11,989.42
  4. Step 4: Simplify right side
    20,484.61x = 339,017,755.58
  5. Step 5: Solve for x
    x = 339,017,755.58/20,484.61
  6. Step 6: Final answer
    x = 16,549.88

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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.