Home / 21,166.98-29,215.71-13,212.06

Finding the Fourth Proportional to 21,166.98, 29,215.71 and 13,212.06

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Solution

The fourth proportional to 21,166.98, 29,215.71 and 13,212.06 is: 18,235.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.98 : 29,215.71 = 13,212.06 : x
  2. Step 2: Convert to fraction form
    21,166.98/29,215.71 = 13,212.06/x
  3. Step 3: Cross multiply
    21,166.98x = 29,215.71 × 13,212.06
  4. Step 4: Simplify right side
    21,166.98x = 385,999,713.46
  5. Step 5: Solve for x
    x = 385,999,713.46/21,166.98
  6. Step 6: Final answer
    x = 18,235.94

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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.