Home / 21,745.34-30,008.40-12,313.90

Finding the Fourth Proportional to 21,745.34, 30,008.40 and 12,313.90

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Solution

The fourth proportional to 21,745.34, 30,008.40 and 12,313.90 is: 16,993.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.34 : 30,008.40 = 12,313.90 : x
  2. Step 2: Convert to fraction form
    21,745.34/30,008.40 = 12,313.90/x
  3. Step 3: Cross multiply
    21,745.34x = 30,008.40 × 12,313.90
  4. Step 4: Simplify right side
    21,745.34x = 369,520,436.76
  5. Step 5: Solve for x
    x = 369,520,436.76/21,745.34
  6. Step 6: Final answer
    x = 16,993.09

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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.