Home / 21,745.36-30,008.10-12,790.90

Finding the Fourth Proportional to 21,745.36, 30,008.10 and 12,790.90

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Solution

The fourth proportional to 21,745.36, 30,008.10 and 12,790.90 is: 17,651.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.36 : 30,008.10 = 12,790.90 : x
  2. Step 2: Convert to fraction form
    21,745.36/30,008.10 = 12,790.90/x
  3. Step 3: Cross multiply
    21,745.36x = 30,008.10 × 12,790.90
  4. Step 4: Simplify right side
    21,745.36x = 383,830,606.29
  5. Step 5: Solve for x
    x = 383,830,606.29/21,745.36
  6. Step 6: Final answer
    x = 17,651.15

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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.