Home / 21,187.98-29,240.82-12,235.86

Finding the Fourth Proportional to 21,187.98, 29,240.82 and 12,235.86

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Solution

The fourth proportional to 21,187.98, 29,240.82 and 12,235.86 is: 16,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.98 : 29,240.82 = 12,235.86 : x
  2. Step 2: Convert to fraction form
    21,187.98/29,240.82 = 12,235.86/x
  3. Step 3: Cross multiply
    21,187.98x = 29,240.82 × 12,235.86
  4. Step 4: Simplify right side
    21,187.98x = 357,786,579.81
  5. Step 5: Solve for x
    x = 357,786,579.81/21,187.98
  6. Step 6: Final answer
    x = 16,886.30

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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.