Home / 12,478.24-18,721.82-5,359.49

Finding the Fourth Proportional to 12,478.24, 18,721.82 and 5,359.49

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Solution

The fourth proportional to 12,478.24, 18,721.82 and 5,359.49 is: 8,041.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.24 : 18,721.82 = 5,359.49 : x
  2. Step 2: Convert to fraction form
    12,478.24/18,721.82 = 5,359.49/x
  3. Step 3: Cross multiply
    12,478.24x = 18,721.82 × 5,359.49
  4. Step 4: Simplify right side
    12,478.24x = 100,339,407.07
  5. Step 5: Solve for x
    x = 100,339,407.07/12,478.24
  6. Step 6: Final answer
    x = 8,041.15

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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.