Home / 20,990.56-28,963.96-12,038.44

Finding the Fourth Proportional to 20,990.56, 28,963.96 and 12,038.44

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Solution

The fourth proportional to 20,990.56, 28,963.96 and 12,038.44 is: 16,611.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.56 : 28,963.96 = 12,038.44 : x
  2. Step 2: Convert to fraction form
    20,990.56/28,963.96 = 12,038.44/x
  3. Step 3: Cross multiply
    20,990.56x = 28,963.96 × 12,038.44
  4. Step 4: Simplify right side
    20,990.56x = 348,680,894.62
  5. Step 5: Solve for x
    x = 348,680,894.62/20,990.56
  6. Step 6: Final answer
    x = 16,611.32

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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.