Home / 20,210.10-30,315.15-12,423.30

Finding the Fourth Proportional to 20,210.10, 30,315.15 and 12,423.30

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Solution

The fourth proportional to 20,210.10, 30,315.15 and 12,423.30 is: 18,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.10 : 30,315.15 = 12,423.30 : x
  2. Step 2: Convert to fraction form
    20,210.10/30,315.15 = 12,423.30/x
  3. Step 3: Cross multiply
    20,210.10x = 30,315.15 × 12,423.30
  4. Step 4: Simplify right side
    20,210.10x = 376,614,203.00
  5. Step 5: Solve for x
    x = 376,614,203.00/20,210.10
  6. Step 6: Final answer
    x = 18,634.95

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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.