Home / 21,795.30-30,072.90-12,836.70

Finding the Fourth Proportional to 21,795.30, 30,072.90 and 12,836.70

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Solution

The fourth proportional to 21,795.30, 30,072.90 and 12,836.70 is: 17,711.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,795.30 : 30,072.90 = 12,836.70 : x
  2. Step 2: Convert to fraction form
    21,795.30/30,072.90 = 12,836.70/x
  3. Step 3: Cross multiply
    21,795.30x = 30,072.90 × 12,836.70
  4. Step 4: Simplify right side
    21,795.30x = 386,036,795.43
  5. Step 5: Solve for x
    x = 386,036,795.43/21,795.30
  6. Step 6: Final answer
    x = 17,711.93

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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.