Home / 20,619.15-30,940.61-12,319.35

Finding the Fourth Proportional to 20,619.15, 30,940.61 and 12,319.35

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Solution

The fourth proportional to 20,619.15, 30,940.61 and 12,319.35 is: 18,486.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.15 : 30,940.61 = 12,319.35 : x
  2. Step 2: Convert to fraction form
    20,619.15/30,940.61 = 12,319.35/x
  3. Step 3: Cross multiply
    20,619.15x = 30,940.61 × 12,319.35
  4. Step 4: Simplify right side
    20,619.15x = 381,168,142.21
  5. Step 5: Solve for x
    x = 381,168,142.21/20,619.15
  6. Step 6: Final answer
    x = 18,486.12

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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.