Home / 21,131.88-29,161.62-12,748.32

Finding the Fourth Proportional to 21,131.88, 29,161.62 and 12,748.32

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Solution

The fourth proportional to 21,131.88, 29,161.62 and 12,748.32 is: 17,592.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.88 : 29,161.62 = 12,748.32 : x
  2. Step 2: Convert to fraction form
    21,131.88/29,161.62 = 12,748.32/x
  3. Step 3: Cross multiply
    21,131.88x = 29,161.62 × 12,748.32
  4. Step 4: Simplify right side
    21,131.88x = 371,761,663.48
  5. Step 5: Solve for x
    x = 371,761,663.48/21,131.88
  6. Step 6: Final answer
    x = 17,592.46

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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.