Home / 21,515.78-29,694.56-12,084.34

Finding the Fourth Proportional to 21,515.78, 29,694.56 and 12,084.34

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Solution

The fourth proportional to 21,515.78, 29,694.56 and 12,084.34 is: 16,677.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.78 : 29,694.56 = 12,084.34 : x
  2. Step 2: Convert to fraction form
    21,515.78/29,694.56 = 12,084.34/x
  3. Step 3: Cross multiply
    21,515.78x = 29,694.56 × 12,084.34
  4. Step 4: Simplify right side
    21,515.78x = 358,839,159.19
  5. Step 5: Solve for x
    x = 358,839,159.19/21,515.78
  6. Step 6: Final answer
    x = 16,677.95

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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.