Home / 13,128.48-19,712.16-12,494.16

Finding the Fourth Proportional to 13,128.48, 19,712.16 and 12,494.16

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Solution

The fourth proportional to 13,128.48, 19,712.16 and 12,494.16 is: 18,759.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.48 : 19,712.16 = 12,494.16 : x
  2. Step 2: Convert to fraction form
    13,128.48/19,712.16 = 12,494.16/x
  3. Step 3: Cross multiply
    13,128.48x = 19,712.16 × 12,494.16
  4. Step 4: Simplify right side
    13,128.48x = 246,286,880.99
  5. Step 5: Solve for x
    x = 246,286,880.99/13,128.48
  6. Step 6: Final answer
    x = 18,759.74

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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.