Home / 13,128.51-19,678.59-6,469.64

Finding the Fourth Proportional to 13,128.51, 19,678.59 and 6,469.64

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Solution

The fourth proportional to 13,128.51, 19,678.59 and 6,469.64 is: 9,697.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.51 : 19,678.59 = 6,469.64 : x
  2. Step 2: Convert to fraction form
    13,128.51/19,678.59 = 6,469.64/x
  3. Step 3: Cross multiply
    13,128.51x = 19,678.59 × 6,469.64
  4. Step 4: Simplify right side
    13,128.51x = 127,313,393.01
  5. Step 5: Solve for x
    x = 127,313,393.01/13,128.51
  6. Step 6: Final answer
    x = 9,697.47

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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.