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Finding the Fourth Proportional to 8,909.69, 13,368.41 and 5,585.55

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Solution

The fourth proportional to 8,909.69, 13,368.41 and 5,585.55 is: 8,380.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.69 : 13,368.41 = 5,585.55 : x
  2. Step 2: Convert to fraction form
    8,909.69/13,368.41 = 5,585.55/x
  3. Step 3: Cross multiply
    8,909.69x = 13,368.41 × 5,585.55
  4. Step 4: Simplify right side
    8,909.69x = 74,669,894.55
  5. Step 5: Solve for x
    x = 74,669,894.55/8,909.69
  6. Step 6: Final answer
    x = 8,380.75

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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.