Home / 21,688.39-29,929.58-12,256.75

Finding the Fourth Proportional to 21,688.39, 29,929.58 and 12,256.75

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Solution

The fourth proportional to 21,688.39, 29,929.58 and 12,256.75 is: 16,914.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.39 : 29,929.58 = 12,256.75 : x
  2. Step 2: Convert to fraction form
    21,688.39/29,929.58 = 12,256.75/x
  3. Step 3: Cross multiply
    21,688.39x = 29,929.58 × 12,256.75
  4. Step 4: Simplify right side
    21,688.39x = 366,839,230.02
  5. Step 5: Solve for x
    x = 366,839,230.02/21,688.39
  6. Step 6: Final answer
    x = 16,914.09

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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.