Home / 21,710.40-29,960.19-12,279.30

Finding the Fourth Proportional to 21,710.40, 29,960.19 and 12,279.30

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Solution

The fourth proportional to 21,710.40, 29,960.19 and 12,279.30 is: 16,945.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.40 : 29,960.19 = 12,279.30 : x
  2. Step 2: Convert to fraction form
    21,710.40/29,960.19 = 12,279.30/x
  3. Step 3: Cross multiply
    21,710.40x = 29,960.19 × 12,279.30
  4. Step 4: Simplify right side
    21,710.40x = 367,890,161.07
  5. Step 5: Solve for x
    x = 367,890,161.07/21,710.40
  6. Step 6: Final answer
    x = 16,945.34

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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.