Home / 13,315.36-18,371.91-8,139.92

Finding the Fourth Proportional to 13,315.36, 18,371.91 and 8,139.92

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Solution

The fourth proportional to 13,315.36, 18,371.91 and 8,139.92 is: 11,231.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.36 : 18,371.91 = 8,139.92 : x
  2. Step 2: Convert to fraction form
    13,315.36/18,371.91 = 8,139.92/x
  3. Step 3: Cross multiply
    13,315.36x = 18,371.91 × 8,139.92
  4. Step 4: Simplify right side
    13,315.36x = 149,545,877.65
  5. Step 5: Solve for x
    x = 149,545,877.65/13,315.36
  6. Step 6: Final answer
    x = 11,231.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.