Home / 20,378.20-30,588.26-12,486.16

Finding the Fourth Proportional to 20,378.20, 30,588.26 and 12,486.16

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Solution

The fourth proportional to 20,378.20, 30,588.26 and 12,486.16 is: 18,742.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.20 : 30,588.26 = 12,486.16 : x
  2. Step 2: Convert to fraction form
    20,378.20/30,588.26 = 12,486.16/x
  3. Step 3: Cross multiply
    20,378.20x = 30,588.26 × 12,486.16
  4. Step 4: Simplify right side
    20,378.20x = 381,929,908.48
  5. Step 5: Solve for x
    x = 381,929,908.48/20,378.20
  6. Step 6: Final answer
    x = 18,742.08

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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.