Home / 21,172.47-29,215.91-12,222.86

Finding the Fourth Proportional to 21,172.47, 29,215.91 and 12,222.86

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Solution

The fourth proportional to 21,172.47, 29,215.91 and 12,222.86 is: 16,866.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.47 : 29,215.91 = 12,222.86 : x
  2. Step 2: Convert to fraction form
    21,172.47/29,215.91 = 12,222.86/x
  3. Step 3: Cross multiply
    21,172.47x = 29,215.91 × 12,222.86
  4. Step 4: Simplify right side
    21,172.47x = 357,101,770.51
  5. Step 5: Solve for x
    x = 357,101,770.51/21,172.47
  6. Step 6: Final answer
    x = 16,866.33

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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.