Home / 21,513.55-29,672.27-15,564.91

Finding the Fourth Proportional to 21,513.55, 29,672.27 and 15,564.91

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Solution

The fourth proportional to 21,513.55, 29,672.27 and 15,564.91 is: 21,467.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.55 : 29,672.27 = 15,564.91 : x
  2. Step 2: Convert to fraction form
    21,513.55/29,672.27 = 15,564.91/x
  3. Step 3: Cross multiply
    21,513.55x = 29,672.27 × 15,564.91
  4. Step 4: Simplify right side
    21,513.55x = 461,846,212.05
  5. Step 5: Solve for x
    x = 461,846,212.05/21,513.55
  6. Step 6: Final answer
    x = 21,467.69

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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.