Home / 21,314.38-31,946.66-12,555.44

Finding the Fourth Proportional to 21,314.38, 31,946.66 and 12,555.44

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Solution

The fourth proportional to 21,314.38, 31,946.66 and 12,555.44 is: 18,818.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.38 : 31,946.66 = 12,555.44 : x
  2. Step 2: Convert to fraction form
    21,314.38/31,946.66 = 12,555.44/x
  3. Step 3: Cross multiply
    21,314.38x = 31,946.66 × 12,555.44
  4. Step 4: Simplify right side
    21,314.38x = 401,104,310.05
  5. Step 5: Solve for x
    x = 401,104,310.05/21,314.38
  6. Step 6: Final answer
    x = 18,818.49

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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.