Home / 13,170.21-18,137.97-13,129.17

Finding the Fourth Proportional to 13,170.21, 18,137.97 and 13,129.17

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Solution

The fourth proportional to 13,170.21, 18,137.97 and 13,129.17 is: 18,081.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.21 : 18,137.97 = 13,129.17 : x
  2. Step 2: Convert to fraction form
    13,170.21/18,137.97 = 13,129.17/x
  3. Step 3: Cross multiply
    13,170.21x = 18,137.97 × 13,129.17
  4. Step 4: Simplify right side
    13,170.21x = 238,136,491.58
  5. Step 5: Solve for x
    x = 238,136,491.58/13,170.21
  6. Step 6: Final answer
    x = 18,081.45

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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.