Home / 21,313.88-31,945.91-12,554.94

Finding the Fourth Proportional to 21,313.88, 31,945.91 and 12,554.94

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Solution

The fourth proportional to 21,313.88, 31,945.91 and 12,554.94 is: 18,817.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.88 : 31,945.91 = 12,554.94 : x
  2. Step 2: Convert to fraction form
    21,313.88/31,945.91 = 12,554.94/x
  3. Step 3: Cross multiply
    21,313.88x = 31,945.91 × 12,554.94
  4. Step 4: Simplify right side
    21,313.88x = 401,078,920.52
  5. Step 5: Solve for x
    x = 401,078,920.52/21,313.88
  6. Step 6: Final answer
    x = 18,817.74

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1.5x scale

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.