Home / 21,170.79-29,215.26-13,102.30

Finding the Fourth Proportional to 21,170.79, 29,215.26 and 13,102.30

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Solution

The fourth proportional to 21,170.79, 29,215.26 and 13,102.30 is: 18,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.79 : 29,215.26 = 13,102.30 : x
  2. Step 2: Convert to fraction form
    21,170.79/29,215.26 = 13,102.30/x
  3. Step 3: Cross multiply
    21,170.79x = 29,215.26 × 13,102.30
  4. Step 4: Simplify right side
    21,170.79x = 382,787,080.22
  5. Step 5: Solve for x
    x = 382,787,080.22/21,170.79
  6. Step 6: Final answer
    x = 18,080.90

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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.