Home / 21,165.78-29,210.58-12,213.66

Finding the Fourth Proportional to 21,165.78, 29,210.58 and 12,213.66

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Solution

The fourth proportional to 21,165.78, 29,210.58 and 12,213.66 is: 16,855.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.78 : 29,210.58 = 12,213.66 : x
  2. Step 2: Convert to fraction form
    21,165.78/29,210.58 = 12,213.66/x
  3. Step 3: Cross multiply
    21,165.78x = 29,210.58 × 12,213.66
  4. Step 4: Simplify right side
    21,165.78x = 356,768,092.52
  5. Step 5: Solve for x
    x = 356,768,092.52/21,165.78
  6. Step 6: Final answer
    x = 16,855.89

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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.