Home / 21,865.39-30,182.03-12,912.93

Finding the Fourth Proportional to 21,865.39, 30,182.03 and 12,912.93

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Solution

The fourth proportional to 21,865.39, 30,182.03 and 12,912.93 is: 17,824.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.39 : 30,182.03 = 12,912.93 : x
  2. Step 2: Convert to fraction form
    21,865.39/30,182.03 = 12,912.93/x
  3. Step 3: Cross multiply
    21,865.39x = 30,182.03 × 12,912.93
  4. Step 4: Simplify right side
    21,865.39x = 389,738,440.65
  5. Step 5: Solve for x
    x = 389,738,440.65/21,865.39
  6. Step 6: Final answer
    x = 17,824.44

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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.