Home / 12,520.71-18,781.67-4,199.88

Finding the Fourth Proportional to 12,520.71, 18,781.67 and 4,199.88

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Solution

The fourth proportional to 12,520.71, 18,781.67 and 4,199.88 is: 6,300.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.71 : 18,781.67 = 4,199.88 : x
  2. Step 2: Convert to fraction form
    12,520.71/18,781.67 = 4,199.88/x
  3. Step 3: Cross multiply
    12,520.71x = 18,781.67 × 4,199.88
  4. Step 4: Simplify right side
    12,520.71x = 78,880,841.13
  5. Step 5: Solve for x
    x = 78,880,841.13/12,520.71
  6. Step 6: Final answer
    x = 6,300.03

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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.