Home / 20,784.48-31,177.64-7,629.68

Finding the Fourth Proportional to 20,784.48, 31,177.64 and 7,629.68

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Solution

The fourth proportional to 20,784.48, 31,177.64 and 7,629.68 is: 11,444.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.48 : 31,177.64 = 7,629.68 : x
  2. Step 2: Convert to fraction form
    20,784.48/31,177.64 = 7,629.68/x
  3. Step 3: Cross multiply
    20,784.48x = 31,177.64 × 7,629.68
  4. Step 4: Simplify right side
    20,784.48x = 237,875,416.36
  5. Step 5: Solve for x
    x = 237,875,416.36/20,784.48
  6. Step 6: Final answer
    x = 11,444.86

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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.