Home / 18,912.90-26,112.38-15,343.99

Finding the Fourth Proportional to 18,912.90, 26,112.38 and 15,343.99

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Solution

The fourth proportional to 18,912.90, 26,112.38 and 15,343.99 is: 21,184.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.90 : 26,112.38 = 15,343.99 : x
  2. Step 2: Convert to fraction form
    18,912.90/26,112.38 = 15,343.99/x
  3. Step 3: Cross multiply
    18,912.90x = 26,112.38 × 15,343.99
  4. Step 4: Simplify right side
    18,912.90x = 400,668,097.60
  5. Step 5: Solve for x
    x = 400,668,097.60/18,912.90
  6. Step 6: Final answer
    x = 21,184.91

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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.