Home / 21,381.77-29,504.86-12,429.15

Finding the Fourth Proportional to 21,381.77, 29,504.86 and 12,429.15

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Solution

The fourth proportional to 21,381.77, 29,504.86 and 12,429.15 is: 17,151.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.77 : 29,504.86 = 12,429.15 : x
  2. Step 2: Convert to fraction form
    21,381.77/29,504.86 = 12,429.15/x
  3. Step 3: Cross multiply
    21,381.77x = 29,504.86 × 12,429.15
  4. Step 4: Simplify right side
    21,381.77x = 366,720,188.95
  5. Step 5: Solve for x
    x = 366,720,188.95/21,381.77
  6. Step 6: Final answer
    x = 17,151.07

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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.