Home / 20,739.81-31,119.73-10,204.12

Finding the Fourth Proportional to 20,739.81, 31,119.73 and 10,204.12

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Solution

The fourth proportional to 20,739.81, 31,119.73 and 10,204.12 is: 15,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.81 : 31,119.73 = 10,204.12 : x
  2. Step 2: Convert to fraction form
    20,739.81/31,119.73 = 10,204.12/x
  3. Step 3: Cross multiply
    20,739.81x = 31,119.73 × 10,204.12
  4. Step 4: Simplify right side
    20,739.81x = 317,549,355.98
  5. Step 5: Solve for x
    x = 317,549,355.98/20,739.81
  6. Step 6: Final answer
    x = 15,311.10

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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.