Home / 11,390.85-15,721.28-6,917.58

Finding the Fourth Proportional to 11,390.85, 15,721.28 and 6,917.58

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Solution

The fourth proportional to 11,390.85, 15,721.28 and 6,917.58 is: 9,547.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.85 : 15,721.28 = 6,917.58 : x
  2. Step 2: Convert to fraction form
    11,390.85/15,721.28 = 6,917.58/x
  3. Step 3: Cross multiply
    11,390.85x = 15,721.28 × 6,917.58
  4. Step 4: Simplify right side
    11,390.85x = 108,753,292.77
  5. Step 5: Solve for x
    x = 108,753,292.77/11,390.85
  6. Step 6: Final answer
    x = 9,547.42

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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.