Home / 20,863.20-31,298.91-7,715.69

Finding the Fourth Proportional to 20,863.20, 31,298.91 and 7,715.69

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Solution

The fourth proportional to 20,863.20, 31,298.91 and 7,715.69 is: 11,575.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.20 : 31,298.91 = 7,715.69 : x
  2. Step 2: Convert to fraction form
    20,863.20/31,298.91 = 7,715.69/x
  3. Step 3: Cross multiply
    20,863.20x = 31,298.91 × 7,715.69
  4. Step 4: Simplify right side
    20,863.20x = 241,492,530.40
  5. Step 5: Solve for x
    x = 241,492,530.40/20,863.20
  6. Step 6: Final answer
    x = 11,575.05

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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.