Home / 21,715.09-29,967.14-13,217.57

Finding the Fourth Proportional to 21,715.09, 29,967.14 and 13,217.57

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Solution

The fourth proportional to 21,715.09, 29,967.14 and 13,217.57 is: 18,240.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.09 : 29,967.14 = 13,217.57 : x
  2. Step 2: Convert to fraction form
    21,715.09/29,967.14 = 13,217.57/x
  3. Step 3: Cross multiply
    21,715.09x = 29,967.14 × 13,217.57
  4. Step 4: Simplify right side
    21,715.09x = 396,092,686.92
  5. Step 5: Solve for x
    x = 396,092,686.92/21,715.09
  6. Step 6: Final answer
    x = 18,240.44

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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.