Home / 20,775.77-31,145.13-7,625.09

Finding the Fourth Proportional to 20,775.77, 31,145.13 and 7,625.09

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Solution

The fourth proportional to 20,775.77, 31,145.13 and 7,625.09 is: 11,430.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.77 : 31,145.13 = 7,625.09 : x
  2. Step 2: Convert to fraction form
    20,775.77/31,145.13 = 7,625.09/x
  3. Step 3: Cross multiply
    20,775.77x = 31,145.13 × 7,625.09
  4. Step 4: Simplify right side
    20,775.77x = 237,484,419.31
  5. Step 5: Solve for x
    x = 237,484,419.31/20,775.77
  6. Step 6: Final answer
    x = 11,430.84

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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.