Home / 20,785.78-31,177.73-7,637.19

Finding the Fourth Proportional to 20,785.78, 31,177.73 and 7,637.19

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Solution

The fourth proportional to 20,785.78, 31,177.73 and 7,637.19 is: 11,455.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.78 : 31,177.73 = 7,637.19 : x
  2. Step 2: Convert to fraction form
    20,785.78/31,177.73 = 7,637.19/x
  3. Step 3: Cross multiply
    20,785.78x = 31,177.73 × 7,637.19
  4. Step 4: Simplify right side
    20,785.78x = 238,110,247.78
  5. Step 5: Solve for x
    x = 238,110,247.78/20,785.78
  6. Step 6: Final answer
    x = 11,455.44

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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.