Home / 21,651.07-29,878.56-11,715.07

Finding the Fourth Proportional to 21,651.07, 29,878.56 and 11,715.07

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Solution

The fourth proportional to 21,651.07, 29,878.56 and 11,715.07 is: 16,166.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.07 : 29,878.56 = 11,715.07 : x
  2. Step 2: Convert to fraction form
    21,651.07/29,878.56 = 11,715.07/x
  3. Step 3: Cross multiply
    21,651.07x = 29,878.56 × 11,715.07
  4. Step 4: Simplify right side
    21,651.07x = 350,029,213.93
  5. Step 5: Solve for x
    x = 350,029,213.93/21,651.07
  6. Step 6: Final answer
    x = 16,166.84

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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.