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Finding the Fourth Proportional to 13,759.90, 18,994.48 and 9,289.71

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Solution

The fourth proportional to 13,759.90, 18,994.48 and 9,289.71 is: 12,823.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.90 : 18,994.48 = 9,289.71 : x
  2. Step 2: Convert to fraction form
    13,759.90/18,994.48 = 9,289.71/x
  3. Step 3: Cross multiply
    13,759.90x = 18,994.48 × 9,289.71
  4. Step 4: Simplify right side
    13,759.90x = 176,453,198.86
  5. Step 5: Solve for x
    x = 176,453,198.86/13,759.90
  6. Step 6: Final answer
    x = 12,823.72

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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.