Home / 21,710.88-29,960.80-12,279.36

Finding the Fourth Proportional to 21,710.88, 29,960.80 and 12,279.36

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Solution

The fourth proportional to 21,710.88, 29,960.80 and 12,279.36 is: 16,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.88 : 29,960.80 = 12,279.36 : x
  2. Step 2: Convert to fraction form
    21,710.88/29,960.80 = 12,279.36/x
  3. Step 3: Cross multiply
    21,710.88x = 29,960.80 × 12,279.36
  4. Step 4: Simplify right side
    21,710.88x = 367,899,449.09
  5. Step 5: Solve for x
    x = 367,899,449.09/21,710.88
  6. Step 6: Final answer
    x = 16,945.40

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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.