Home / 21,604.14-29,815.20-12,172.71

Finding the Fourth Proportional to 21,604.14, 29,815.20 and 12,172.71

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Solution

The fourth proportional to 21,604.14, 29,815.20 and 12,172.71 is: 16,799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,604.14 : 29,815.20 = 12,172.71 : x
  2. Step 2: Convert to fraction form
    21,604.14/29,815.20 = 12,172.71/x
  3. Step 3: Cross multiply
    21,604.14x = 29,815.20 × 12,172.71
  4. Step 4: Simplify right side
    21,604.14x = 362,931,783.19
  5. Step 5: Solve for x
    x = 362,931,783.19/21,604.14
  6. Step 6: Final answer
    x = 16,799.18

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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.