Home / 13,191.49-19,787.19-5,400.31

Finding the Fourth Proportional to 13,191.49, 19,787.19 and 5,400.31

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Solution

The fourth proportional to 13,191.49, 19,787.19 and 5,400.31 is: 8,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.49 : 19,787.19 = 5,400.31 : x
  2. Step 2: Convert to fraction form
    13,191.49/19,787.19 = 5,400.31/x
  3. Step 3: Cross multiply
    13,191.49x = 19,787.19 × 5,400.31
  4. Step 4: Simplify right side
    13,191.49x = 106,856,960.03
  5. Step 5: Solve for x
    x = 106,856,960.03/13,191.49
  6. Step 6: Final answer
    x = 8,100.45

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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.