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Finding the Fourth Proportional to 21,396.69, 29,535.54 and 19,154.54

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Solution

The fourth proportional to 21,396.69, 29,535.54 and 19,154.54 is: 26,440.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396.69 : 29,535.54 = 19,154.54 : x
  2. Step 2: Convert to fraction form
    21,396.69/29,535.54 = 19,154.54/x
  3. Step 3: Cross multiply
    21,396.69x = 29,535.54 × 19,154.54
  4. Step 4: Simplify right side
    21,396.69x = 565,739,684.36
  5. Step 5: Solve for x
    x = 565,739,684.36/21,396.69
  6. Step 6: Final answer
    x = 26,440.52

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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.