Home / 13,787.48-20,690.42-8,860.66

Finding the Fourth Proportional to 13,787.48, 20,690.42 and 8,860.66

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Solution

The fourth proportional to 13,787.48, 20,690.42 and 8,860.66 is: 13,296.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.48 : 20,690.42 = 8,860.66 : x
  2. Step 2: Convert to fraction form
    13,787.48/20,690.42 = 8,860.66/x
  3. Step 3: Cross multiply
    13,787.48x = 20,690.42 × 8,860.66
  4. Step 4: Simplify right side
    13,787.48x = 183,330,680.85
  5. Step 5: Solve for x
    x = 183,330,680.85/13,787.48
  6. Step 6: Final answer
    x = 13,296.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.