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Finding the Fourth Proportional to 11,749.50, 16,215.03 and 6,781.50

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Solution

The fourth proportional to 11,749.50, 16,215.03 and 6,781.50 is: 9,358.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,749.50 : 16,215.03 = 6,781.50 : x
  2. Step 2: Convert to fraction form
    11,749.50/16,215.03 = 6,781.50/x
  3. Step 3: Cross multiply
    11,749.50x = 16,215.03 × 6,781.50
  4. Step 4: Simplify right side
    11,749.50x = 109,962,225.95
  5. Step 5: Solve for x
    x = 109,962,225.95/11,749.50
  6. Step 6: Final answer
    x = 9,358.89

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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.