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Finding the Fourth Proportional to 21,911.76, 30,174.53 and 19,039.14

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Solution

The fourth proportional to 21,911.76, 30,174.53 and 19,039.14 is: 26,218.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.76 : 30,174.53 = 19,039.14 : x
  2. Step 2: Convert to fraction form
    21,911.76/30,174.53 = 19,039.14/x
  3. Step 3: Cross multiply
    21,911.76x = 30,174.53 × 19,039.14
  4. Step 4: Simplify right side
    21,911.76x = 574,497,005.91
  5. Step 5: Solve for x
    x = 574,497,005.91/21,911.76
  6. Step 6: Final answer
    x = 26,218.66

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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.