Home / 30,143.13-45,205.46-20,842.92

Finding the Fourth Proportional to 30,143.13, 45,205.46 and 20,842.92

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Solution

The fourth proportional to 30,143.13, 45,205.46 and 20,842.92 is: 31,257.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,143.13 : 45,205.46 = 20,842.92 : x
  2. Step 2: Convert to fraction form
    30,143.13/45,205.46 = 20,842.92/x
  3. Step 3: Cross multiply
    30,143.13x = 45,205.46 × 20,842.92
  4. Step 4: Simplify right side
    30,143.13x = 942,213,786.34
  5. Step 5: Solve for x
    x = 942,213,786.34/30,143.13
  6. Step 6: Final answer
    x = 31,257.99

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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.