Home / 13,120.62-18,111.51-9,611.70

Finding the Fourth Proportional to 13,120.62, 18,111.51 and 9,611.70

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Solution

The fourth proportional to 13,120.62, 18,111.51 and 9,611.70 is: 13,267.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.62 : 18,111.51 = 9,611.70 : x
  2. Step 2: Convert to fraction form
    13,120.62/18,111.51 = 9,611.70/x
  3. Step 3: Cross multiply
    13,120.62x = 18,111.51 × 9,611.70
  4. Step 4: Simplify right side
    13,120.62x = 174,082,400.67
  5. Step 5: Solve for x
    x = 174,082,400.67/13,120.62
  6. Step 6: Final answer
    x = 13,267.85

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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.