Home / 20,145.12-30,220.24-11,715.54

Finding the Fourth Proportional to 20,145.12, 30,220.24 and 11,715.54

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Solution

The fourth proportional to 20,145.12, 30,220.24 and 11,715.54 is: 17,574.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.12 : 30,220.24 = 11,715.54 : x
  2. Step 2: Convert to fraction form
    20,145.12/30,220.24 = 11,715.54/x
  3. Step 3: Cross multiply
    20,145.12x = 30,220.24 × 11,715.54
  4. Step 4: Simplify right side
    20,145.12x = 354,046,430.53
  5. Step 5: Solve for x
    x = 354,046,430.53/20,145.12
  6. Step 6: Final answer
    x = 17,574.80

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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.