Home / 20,900.64-31,359.12-9,205.62

Finding the Fourth Proportional to 20,900.64, 31,359.12 and 9,205.62

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Solution

The fourth proportional to 20,900.64, 31,359.12 and 9,205.62 is: 13,812.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.64 : 31,359.12 = 9,205.62 : x
  2. Step 2: Convert to fraction form
    20,900.64/31,359.12 = 9,205.62/x
  3. Step 3: Cross multiply
    20,900.64x = 31,359.12 × 9,205.62
  4. Step 4: Simplify right side
    20,900.64x = 288,680,142.25
  5. Step 5: Solve for x
    x = 288,680,142.25/20,900.64
  6. Step 6: Final answer
    x = 13,812.02

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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.