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Finding the Fourth Proportional to 13,445.90, 20,172.90 and 9,557.90

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Solution

The fourth proportional to 13,445.90, 20,172.90 and 9,557.90 is: 14,339.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.90 : 20,172.90 = 9,557.90 : x
  2. Step 2: Convert to fraction form
    13,445.90/20,172.90 = 9,557.90/x
  3. Step 3: Cross multiply
    13,445.90x = 20,172.90 × 9,557.90
  4. Step 4: Simplify right side
    13,445.90x = 192,810,560.91
  5. Step 5: Solve for x
    x = 192,810,560.91/13,445.90
  6. Step 6: Final answer
    x = 14,339.73

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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.