Home / 21,405.85-29,551.94-12,910.13

Finding the Fourth Proportional to 21,405.85, 29,551.94 and 12,910.13

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Solution

The fourth proportional to 21,405.85, 29,551.94 and 12,910.13 is: 17,823.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.85 : 29,551.94 = 12,910.13 : x
  2. Step 2: Convert to fraction form
    21,405.85/29,551.94 = 12,910.13/x
  3. Step 3: Cross multiply
    21,405.85x = 29,551.94 × 12,910.13
  4. Step 4: Simplify right side
    21,405.85x = 381,519,406.69
  5. Step 5: Solve for x
    x = 381,519,406.69/21,405.85
  6. Step 6: Final answer
    x = 17,823.14

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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.