Home / 11,142.78-15,376.59-6,663.89

Finding the Fourth Proportional to 11,142.78, 15,376.59 and 6,663.89

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Solution

The fourth proportional to 11,142.78, 15,376.59 and 6,663.89 is: 9,195.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,142.78 : 15,376.59 = 6,663.89 : x
  2. Step 2: Convert to fraction form
    11,142.78/15,376.59 = 6,663.89/x
  3. Step 3: Cross multiply
    11,142.78x = 15,376.59 × 6,663.89
  4. Step 4: Simplify right side
    11,142.78x = 102,467,827.45
  5. Step 5: Solve for x
    x = 102,467,827.45/11,142.78
  6. Step 6: Final answer
    x = 9,195.89

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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.