Home / 21,121.65-31,594.95-19,197.09

Finding the Fourth Proportional to 21,121.65, 31,594.95 and 19,197.09

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Solution

The fourth proportional to 21,121.65, 31,594.95 and 19,197.09 is: 28,716.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.65 : 31,594.95 = 19,197.09 : x
  2. Step 2: Convert to fraction form
    21,121.65/31,594.95 = 19,197.09/x
  3. Step 3: Cross multiply
    21,121.65x = 31,594.95 × 19,197.09
  4. Step 4: Simplify right side
    21,121.65x = 606,531,098.70
  5. Step 5: Solve for x
    x = 606,531,098.70/21,121.65
  6. Step 6: Final answer
    x = 28,716.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.