Home / 20,431.24-30,594.78-18,720.52

Finding the Fourth Proportional to 20,431.24, 30,594.78 and 18,720.52

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Solution

The fourth proportional to 20,431.24, 30,594.78 and 18,720.52 is: 28,033.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.24 : 30,594.78 = 18,720.52 : x
  2. Step 2: Convert to fraction form
    20,431.24/30,594.78 = 18,720.52/x
  3. Step 3: Cross multiply
    20,431.24x = 30,594.78 × 18,720.52
  4. Step 4: Simplify right side
    20,431.24x = 572,750,190.89
  5. Step 5: Solve for x
    x = 572,750,190.89/20,431.24
  6. Step 6: Final answer
    x = 28,033.06

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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.