Home / 20,005.60-27,611.12-15,217.87

Finding the Fourth Proportional to 20,005.60, 27,611.12 and 15,217.87

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Solution

The fourth proportional to 20,005.60, 27,611.12 and 15,217.87 is: 21,003.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.60 : 27,611.12 = 15,217.87 : x
  2. Step 2: Convert to fraction form
    20,005.60/27,611.12 = 15,217.87/x
  3. Step 3: Cross multiply
    20,005.60x = 27,611.12 × 15,217.87
  4. Step 4: Simplify right side
    20,005.60x = 420,182,434.71
  5. Step 5: Solve for x
    x = 420,182,434.71/20,005.60
  6. Step 6: Final answer
    x = 21,003.24

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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.