Home / 21,279.45-31,954.74-13,292.80

Finding the Fourth Proportional to 21,279.45, 31,954.74 and 13,292.80

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Solution

The fourth proportional to 21,279.45, 31,954.74 and 13,292.80 is: 19,961.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.45 : 31,954.74 = 13,292.80 : x
  2. Step 2: Convert to fraction form
    21,279.45/31,954.74 = 13,292.80/x
  3. Step 3: Cross multiply
    21,279.45x = 31,954.74 × 13,292.80
  4. Step 4: Simplify right side
    21,279.45x = 424,767,813.49
  5. Step 5: Solve for x
    x = 424,767,813.49/21,279.45
  6. Step 6: Final answer
    x = 19,961.41

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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.