Home / 21,255.29-31,853.77-13,450.13

Finding the Fourth Proportional to 21,255.29, 31,853.77 and 13,450.13

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Solution

The fourth proportional to 21,255.29, 31,853.77 and 13,450.13 is: 20,156.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.29 : 31,853.77 = 13,450.13 : x
  2. Step 2: Convert to fraction form
    21,255.29/31,853.77 = 13,450.13/x
  3. Step 3: Cross multiply
    21,255.29x = 31,853.77 × 13,450.13
  4. Step 4: Simplify right side
    21,255.29x = 428,437,347.49
  5. Step 5: Solve for x
    x = 428,437,347.49/21,255.29
  6. Step 6: Final answer
    x = 20,156.74

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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.