Home / 13,821.98-20,729.72-9,438.26

Finding the Fourth Proportional to 13,821.98, 20,729.72 and 9,438.26

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Solution

The fourth proportional to 13,821.98, 20,729.72 and 9,438.26 is: 14,155.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,821.98 : 20,729.72 = 9,438.26 : x
  2. Step 2: Convert to fraction form
    13,821.98/20,729.72 = 9,438.26/x
  3. Step 3: Cross multiply
    13,821.98x = 20,729.72 × 9,438.26
  4. Step 4: Simplify right side
    13,821.98x = 195,652,407.03
  5. Step 5: Solve for x
    x = 195,652,407.03/13,821.98
  6. Step 6: Final answer
    x = 14,155.17

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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.