Home / 19,989.55-29,979.10-5,945.80

Finding the Fourth Proportional to 19,989.55, 29,979.10 and 5,945.80

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Solution

The fourth proportional to 19,989.55, 29,979.10 and 5,945.80 is: 8,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.55 : 29,979.10 = 5,945.80 : x
  2. Step 2: Convert to fraction form
    19,989.55/29,979.10 = 5,945.80/x
  3. Step 3: Cross multiply
    19,989.55x = 29,979.10 × 5,945.80
  4. Step 4: Simplify right side
    19,989.55x = 178,249,732.78
  5. Step 5: Solve for x
    x = 178,249,732.78/19,989.55
  6. Step 6: Final answer
    x = 8,917.15

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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.