Home / 13,431.53-18,535.84-7,381.72

Finding the Fourth Proportional to 13,431.53, 18,535.84 and 7,381.72

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Solution

The fourth proportional to 13,431.53, 18,535.84 and 7,381.72 is: 10,186.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.53 : 18,535.84 = 7,381.72 : x
  2. Step 2: Convert to fraction form
    13,431.53/18,535.84 = 7,381.72/x
  3. Step 3: Cross multiply
    13,431.53x = 18,535.84 × 7,381.72
  4. Step 4: Simplify right side
    13,431.53x = 136,826,380.84
  5. Step 5: Solve for x
    x = 136,826,380.84/13,431.53
  6. Step 6: Final answer
    x = 10,186.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.