Home / 20,259.85-30,400.68-9,871.60

Finding the Fourth Proportional to 20,259.85, 30,400.68 and 9,871.60

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Solution

The fourth proportional to 20,259.85, 30,400.68 and 9,871.60 is: 14,812.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,259.85 : 30,400.68 = 9,871.60 : x
  2. Step 2: Convert to fraction form
    20,259.85/30,400.68 = 9,871.60/x
  3. Step 3: Cross multiply
    20,259.85x = 30,400.68 × 9,871.60
  4. Step 4: Simplify right side
    20,259.85x = 300,103,352.69
  5. Step 5: Solve for x
    x = 300,103,352.69/20,259.85
  6. Step 6: Final answer
    x = 14,812.71

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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.