Home / 20,904.89-31,340.75-7,575.80

Finding the Fourth Proportional to 20,904.89, 31,340.75 and 7,575.80

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Solution

The fourth proportional to 20,904.89, 31,340.75 and 7,575.80 is: 11,357.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.89 : 31,340.75 = 7,575.80 : x
  2. Step 2: Convert to fraction form
    20,904.89/31,340.75 = 7,575.80/x
  3. Step 3: Cross multiply
    20,904.89x = 31,340.75 × 7,575.80
  4. Step 4: Simplify right side
    20,904.89x = 237,431,345.01
  5. Step 5: Solve for x
    x = 237,431,345.01/20,904.89
  6. Step 6: Final answer
    x = 11,357.70

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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.