Home / 20,901.88-31,358.68-8,900.08

Finding the Fourth Proportional to 20,901.88, 31,358.68 and 8,900.08

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Solution

The fourth proportional to 20,901.88, 31,358.68 and 8,900.08 is: 13,352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.88 : 31,358.68 = 8,900.08 : x
  2. Step 2: Convert to fraction form
    20,901.88/31,358.68 = 8,900.08/x
  3. Step 3: Cross multiply
    20,901.88x = 31,358.68 × 8,900.08
  4. Step 4: Simplify right side
    20,901.88x = 279,094,760.69
  5. Step 5: Solve for x
    x = 279,094,760.69/20,901.88
  6. Step 6: Final answer
    x = 13,352.62

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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.