Home / 21,745.80-30,009.06-12,314.40

Finding the Fourth Proportional to 21,745.80, 30,009.06 and 12,314.40

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Solution

The fourth proportional to 21,745.80, 30,009.06 and 12,314.40 is: 16,993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.80 : 30,009.06 = 12,314.40 : x
  2. Step 2: Convert to fraction form
    21,745.80/30,009.06 = 12,314.40/x
  3. Step 3: Cross multiply
    21,745.80x = 30,009.06 × 12,314.40
  4. Step 4: Simplify right side
    21,745.80x = 369,543,568.46
  5. Step 5: Solve for x
    x = 369,543,568.46/21,745.80
  6. Step 6: Final answer
    x = 16,993.79

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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.