Home / 21,279.16-29,364.72-11,847.52

Finding the Fourth Proportional to 21,279.16, 29,364.72 and 11,847.52

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Solution

The fourth proportional to 21,279.16, 29,364.72 and 11,847.52 is: 16,349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.16 : 29,364.72 = 11,847.52 : x
  2. Step 2: Convert to fraction form
    21,279.16/29,364.72 = 11,847.52/x
  3. Step 3: Cross multiply
    21,279.16x = 29,364.72 × 11,847.52
  4. Step 4: Simplify right side
    21,279.16x = 347,899,107.49
  5. Step 5: Solve for x
    x = 347,899,107.49/21,279.16
  6. Step 6: Final answer
    x = 16,349.29

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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.