Home / 21,745.25-30,007.55-12,671.48

Finding the Fourth Proportional to 21,745.25, 30,007.55 and 12,671.48

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Solution

The fourth proportional to 21,745.25, 30,007.55 and 12,671.48 is: 17,486.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.25 : 30,007.55 = 12,671.48 : x
  2. Step 2: Convert to fraction form
    21,745.25/30,007.55 = 12,671.48/x
  3. Step 3: Cross multiply
    21,745.25x = 30,007.55 × 12,671.48
  4. Step 4: Simplify right side
    21,745.25x = 380,240,069.67
  5. Step 5: Solve for x
    x = 380,240,069.67/21,745.25
  6. Step 6: Final answer
    x = 17,486.12

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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.