Home / 11,105.63-15,327.19-6,389.91

Finding the Fourth Proportional to 11,105.63, 15,327.19 and 6,389.91

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Solution

The fourth proportional to 11,105.63, 15,327.19 and 6,389.91 is: 8,818.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,105.63 : 15,327.19 = 6,389.91 : x
  2. Step 2: Convert to fraction form
    11,105.63/15,327.19 = 6,389.91/x
  3. Step 3: Cross multiply
    11,105.63x = 15,327.19 × 6,389.91
  4. Step 4: Simplify right side
    11,105.63x = 97,939,364.65
  5. Step 5: Solve for x
    x = 97,939,364.65/11,105.63
  6. Step 6: Final answer
    x = 8,818.89

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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.