Home / 21,406.36-29,538.12-11,972.56

Finding the Fourth Proportional to 21,406.36, 29,538.12 and 11,972.56

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Solution

The fourth proportional to 21,406.36, 29,538.12 and 11,972.56 is: 16,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.36 : 29,538.12 = 11,972.56 : x
  2. Step 2: Convert to fraction form
    21,406.36/29,538.12 = 11,972.56/x
  3. Step 3: Cross multiply
    21,406.36x = 29,538.12 × 11,972.56
  4. Step 4: Simplify right side
    21,406.36x = 353,646,913.99
  5. Step 5: Solve for x
    x = 353,646,913.99/21,406.36
  6. Step 6: Final answer
    x = 16,520.65

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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.