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Finding the Fourth Proportional to 13,443.90, 20,169.90 and 9,555.90

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Solution

The fourth proportional to 13,443.90, 20,169.90 and 9,555.90 is: 14,336.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,443.90 : 20,169.90 = 9,555.90 : x
  2. Step 2: Convert to fraction form
    13,443.90/20,169.90 = 9,555.90/x
  3. Step 3: Cross multiply
    13,443.90x = 20,169.90 × 9,555.90
  4. Step 4: Simplify right side
    13,443.90x = 192,741,547.41
  5. Step 5: Solve for x
    x = 192,741,547.41/13,443.90
  6. Step 6: Final answer
    x = 14,336.73

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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.