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Finding the Fourth Proportional to 21,525.62, 29,706.01 and 13,029.29

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Solution

The fourth proportional to 21,525.62, 29,706.01 and 13,029.29 is: 17,980.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,525.62 : 29,706.01 = 13,029.29 : x
  2. Step 2: Convert to fraction form
    21,525.62/29,706.01 = 13,029.29/x
  3. Step 3: Cross multiply
    21,525.62x = 29,706.01 × 13,029.29
  4. Step 4: Simplify right side
    21,525.62x = 387,048,149.33
  5. Step 5: Solve for x
    x = 387,048,149.33/21,525.62
  6. Step 6: Final answer
    x = 17,980.82

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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.