Home / 20,422.18-30,580.68-12,108.07

Finding the Fourth Proportional to 20,422.18, 30,580.68 and 12,108.07

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Solution

The fourth proportional to 20,422.18, 30,580.68 and 12,108.07 is: 18,130.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.18 : 30,580.68 = 12,108.07 : x
  2. Step 2: Convert to fraction form
    20,422.18/30,580.68 = 12,108.07/x
  3. Step 3: Cross multiply
    20,422.18x = 30,580.68 × 12,108.07
  4. Step 4: Simplify right side
    20,422.18x = 370,273,014.09
  5. Step 5: Solve for x
    x = 370,273,014.09/20,422.18
  6. Step 6: Final answer
    x = 18,130.93

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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.