Home / 21,716.88-29,969.08-12,285.36

Finding the Fourth Proportional to 21,716.88, 29,969.08 and 12,285.36

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Solution

The fourth proportional to 21,716.88, 29,969.08 and 12,285.36 is: 16,953.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,716.88 : 29,969.08 = 12,285.36 : x
  2. Step 2: Convert to fraction form
    21,716.88/29,969.08 = 12,285.36/x
  3. Step 3: Cross multiply
    21,716.88x = 29,969.08 × 12,285.36
  4. Step 4: Simplify right side
    21,716.88x = 368,180,936.67
  5. Step 5: Solve for x
    x = 368,180,936.67/21,716.88
  6. Step 6: Final answer
    x = 16,953.68

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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.