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Finding the Fourth Proportional to 8,919.91, 13,380.17 and 4,237.50

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Solution

The fourth proportional to 8,919.91, 13,380.17 and 4,237.50 is: 6,356.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.91 : 13,380.17 = 4,237.50 : x
  2. Step 2: Convert to fraction form
    8,919.91/13,380.17 = 4,237.50/x
  3. Step 3: Cross multiply
    8,919.91x = 13,380.17 × 4,237.50
  4. Step 4: Simplify right side
    8,919.91x = 56,698,470.38
  5. Step 5: Solve for x
    x = 56,698,470.38/8,919.91
  6. Step 6: Final answer
    x = 6,356.39

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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.