Home / 20,940.12-31,410.45-5,357.70

Finding the Fourth Proportional to 20,940.12, 31,410.45 and 5,357.70

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Solution

The fourth proportional to 20,940.12, 31,410.45 and 5,357.70 is: 8,036.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.12 : 31,410.45 = 5,357.70 : x
  2. Step 2: Convert to fraction form
    20,940.12/31,410.45 = 5,357.70/x
  3. Step 3: Cross multiply
    20,940.12x = 31,410.45 × 5,357.70
  4. Step 4: Simplify right side
    20,940.12x = 168,287,767.97
  5. Step 5: Solve for x
    x = 168,287,767.97/20,940.12
  6. Step 6: Final answer
    x = 8,036.62

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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.