Home / 11,405.70-17,121.35-8,820.10

Finding the Fourth Proportional to 11,405.70, 17,121.35 and 8,820.10

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Solution

The fourth proportional to 11,405.70, 17,121.35 and 8,820.10 is: 13,240.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.70 : 17,121.35 = 8,820.10 : x
  2. Step 2: Convert to fraction form
    11,405.70/17,121.35 = 8,820.10/x
  3. Step 3: Cross multiply
    11,405.70x = 17,121.35 × 8,820.10
  4. Step 4: Simplify right side
    11,405.70x = 151,012,019.14
  5. Step 5: Solve for x
    x = 151,012,019.14/11,405.70
  6. Step 6: Final answer
    x = 13,240.05

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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.