Home / 21,090.24-29,116.80-12,709.44

Finding the Fourth Proportional to 21,090.24, 29,116.80 and 12,709.44

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Solution

The fourth proportional to 21,090.24, 29,116.80 and 12,709.44 is: 17,546.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.24 : 29,116.80 = 12,709.44 : x
  2. Step 2: Convert to fraction form
    21,090.24/29,116.80 = 12,709.44/x
  3. Step 3: Cross multiply
    21,090.24x = 29,116.80 × 12,709.44
  4. Step 4: Simplify right side
    21,090.24x = 370,058,222.59
  5. Step 5: Solve for x
    x = 370,058,222.59/21,090.24
  6. Step 6: Final answer
    x = 17,546.42

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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.