Home / 11,139.03-15,371.40-6,661.91

Finding the Fourth Proportional to 11,139.03, 15,371.40 and 6,661.91

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Solution

The fourth proportional to 11,139.03, 15,371.40 and 6,661.91 is: 9,193.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.03 : 15,371.40 = 6,661.91 : x
  2. Step 2: Convert to fraction form
    11,139.03/15,371.40 = 6,661.91/x
  3. Step 3: Cross multiply
    11,139.03x = 15,371.40 × 6,661.91
  4. Step 4: Simplify right side
    11,139.03x = 102,402,883.37
  5. Step 5: Solve for x
    x = 102,402,883.37/11,139.03
  6. Step 6: Final answer
    x = 9,193.16

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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.