Home / 30,216.20-45,324.30-12,720.20

Finding the Fourth Proportional to 30,216.20, 45,324.30 and 12,720.20

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Solution

The fourth proportional to 30,216.20, 45,324.30 and 12,720.20 is: 19,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,216.20 : 45,324.30 = 12,720.20 : x
  2. Step 2: Convert to fraction form
    30,216.20/45,324.30 = 12,720.20/x
  3. Step 3: Cross multiply
    30,216.20x = 45,324.30 × 12,720.20
  4. Step 4: Simplify right side
    30,216.20x = 576,534,160.86
  5. Step 5: Solve for x
    x = 576,534,160.86/30,216.20
  6. Step 6: Final answer
    x = 19,080.30

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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.