Home / 13,135.80-19,671.30-8,729.40

Finding the Fourth Proportional to 13,135.80, 19,671.30 and 8,729.40

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Solution

The fourth proportional to 13,135.80, 19,671.30 and 8,729.40 is: 13,072.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.80 : 19,671.30 = 8,729.40 : x
  2. Step 2: Convert to fraction form
    13,135.80/19,671.30 = 8,729.40/x
  3. Step 3: Cross multiply
    13,135.80x = 19,671.30 × 8,729.40
  4. Step 4: Simplify right side
    13,135.80x = 171,718,646.22
  5. Step 5: Solve for x
    x = 171,718,646.22/13,135.80
  6. Step 6: Final answer
    x = 13,072.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.