Home / 13,147.47-19,721.39-3,787.65

Finding the Fourth Proportional to 13,147.47, 19,721.39 and 3,787.65

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Solution

The fourth proportional to 13,147.47, 19,721.39 and 3,787.65 is: 5,681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.47 : 19,721.39 = 3,787.65 : x
  2. Step 2: Convert to fraction form
    13,147.47/19,721.39 = 3,787.65/x
  3. Step 3: Cross multiply
    13,147.47x = 19,721.39 × 3,787.65
  4. Step 4: Simplify right side
    13,147.47x = 74,697,722.83
  5. Step 5: Solve for x
    x = 74,697,722.83/13,147.47
  6. Step 6: Final answer
    x = 5,681.53

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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.