Home / 21,167.94-29,212.74-12,215.28

Finding the Fourth Proportional to 21,167.94, 29,212.74 and 12,215.28

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Solution

The fourth proportional to 21,167.94, 29,212.74 and 12,215.28 is: 16,857.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.94 : 29,212.74 = 12,215.28 : x
  2. Step 2: Convert to fraction form
    21,167.94/29,212.74 = 12,215.28/x
  3. Step 3: Cross multiply
    21,167.94x = 29,212.74 × 12,215.28
  4. Step 4: Simplify right side
    21,167.94x = 356,841,798.67
  5. Step 5: Solve for x
    x = 356,841,798.67/21,167.94
  6. Step 6: Final answer
    x = 16,857.65

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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.