Home / 15,325.15-21,147.90-8,611.06

Finding the Fourth Proportional to 15,325.15, 21,147.90 and 8,611.06

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Solution

The fourth proportional to 15,325.15, 21,147.90 and 8,611.06 is: 11,882.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,325.15 : 21,147.90 = 8,611.06 : x
  2. Step 2: Convert to fraction form
    15,325.15/21,147.90 = 8,611.06/x
  3. Step 3: Cross multiply
    15,325.15x = 21,147.90 × 8,611.06
  4. Step 4: Simplify right side
    15,325.15x = 182,105,835.77
  5. Step 5: Solve for x
    x = 182,105,835.77/15,325.15
  6. Step 6: Final answer
    x = 11,882.81

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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.