Home / 19,515-26,942.31-12,812.37

Finding the Fourth Proportional to 19,515, 26,942.31 and 12,812.37

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Solution

The fourth proportional to 19,515, 26,942.31 and 12,812.37 is: 17,688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,515 : 26,942.31 = 12,812.37 : x
  2. Step 2: Convert to fraction form
    19,515/26,942.31 = 12,812.37/x
  3. Step 3: Cross multiply
    19,515x = 26,942.31 × 12,812.37
  4. Step 4: Simplify right side
    19,515x = 345,194,844.37
  5. Step 5: Solve for x
    x = 345,194,844.37/19,515
  6. Step 6: Final answer
    x = 17,688.69

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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.