Home / 21,622.77-29,839.86-12,189.51

Finding the Fourth Proportional to 21,622.77, 29,839.86 and 12,189.51

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Solution

The fourth proportional to 21,622.77, 29,839.86 and 12,189.51 is: 16,821.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.77 : 29,839.86 = 12,189.51 : x
  2. Step 2: Convert to fraction form
    21,622.77/29,839.86 = 12,189.51/x
  3. Step 3: Cross multiply
    21,622.77x = 29,839.86 × 12,189.51
  4. Step 4: Simplify right side
    21,622.77x = 363,733,271.87
  5. Step 5: Solve for x
    x = 363,733,271.87/21,622.77
  6. Step 6: Final answer
    x = 16,821.77

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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.