Home / 21,235.60-29,300.86-12,279.84

Finding the Fourth Proportional to 21,235.60, 29,300.86 and 12,279.84

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Solution

The fourth proportional to 21,235.60, 29,300.86 and 12,279.84 is: 16,943.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.60 : 29,300.86 = 12,279.84 : x
  2. Step 2: Convert to fraction form
    21,235.60/29,300.86 = 12,279.84/x
  3. Step 3: Cross multiply
    21,235.60x = 29,300.86 × 12,279.84
  4. Step 4: Simplify right side
    21,235.60x = 359,809,872.66
  5. Step 5: Solve for x
    x = 359,809,872.66/21,235.60
  6. Step 6: Final answer
    x = 16,943.71

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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.