Home / 12,721.53-19,078.64-4,287.11

Finding the Fourth Proportional to 12,721.53, 19,078.64 and 4,287.11

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Solution

The fourth proportional to 12,721.53, 19,078.64 and 4,287.11 is: 6,429.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.53 : 19,078.64 = 4,287.11 : x
  2. Step 2: Convert to fraction form
    12,721.53/19,078.64 = 4,287.11/x
  3. Step 3: Cross multiply
    12,721.53x = 19,078.64 × 4,287.11
  4. Step 4: Simplify right side
    12,721.53x = 81,792,111.50
  5. Step 5: Solve for x
    x = 81,792,111.50/12,721.53
  6. Step 6: Final answer
    x = 6,429.43

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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.