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Finding the Fourth Proportional to 11,774.72, 17,663.80 and 3,985.76

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Solution

The fourth proportional to 11,774.72, 17,663.80 and 3,985.76 is: 5,979.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,774.72 : 17,663.80 = 3,985.76 : x
  2. Step 2: Convert to fraction form
    11,774.72/17,663.80 = 3,985.76/x
  3. Step 3: Cross multiply
    11,774.72x = 17,663.80 × 3,985.76
  4. Step 4: Simplify right side
    11,774.72x = 70,403,667.49
  5. Step 5: Solve for x
    x = 70,403,667.49/11,774.72
  6. Step 6: Final answer
    x = 5,979.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.