Home / 12,491.99-18,721.74-5,087.78

Finding the Fourth Proportional to 12,491.99, 18,721.74 and 5,087.78

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Solution

The fourth proportional to 12,491.99, 18,721.74 and 5,087.78 is: 7,625.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.99 : 18,721.74 = 5,087.78 : x
  2. Step 2: Convert to fraction form
    12,491.99/18,721.74 = 5,087.78/x
  3. Step 3: Cross multiply
    12,491.99x = 18,721.74 × 5,087.78
  4. Step 4: Simplify right side
    12,491.99x = 95,252,094.34
  5. Step 5: Solve for x
    x = 95,252,094.34/12,491.99
  6. Step 6: Final answer
    x = 7,625.05

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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.