Home / 13,438.45-20,131.06-9,211.30

Finding the Fourth Proportional to 13,438.45, 20,131.06 and 9,211.30

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Solution

The fourth proportional to 13,438.45, 20,131.06 and 9,211.30 is: 13,798.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.45 : 20,131.06 = 9,211.30 : x
  2. Step 2: Convert to fraction form
    13,438.45/20,131.06 = 9,211.30/x
  3. Step 3: Cross multiply
    13,438.45x = 20,131.06 × 9,211.30
  4. Step 4: Simplify right side
    13,438.45x = 185,433,159.62
  5. Step 5: Solve for x
    x = 185,433,159.62/13,438.45
  6. Step 6: Final answer
    x = 13,798.70

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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.