Home / 12,629.12-17,428.80-7,040

Finding the Fourth Proportional to 12,629.12, 17,428.80 and 7,040

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Solution

The fourth proportional to 12,629.12, 17,428.80 and 7,040 is: 9,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.12 : 17,428.80 = 7,040 : x
  2. Step 2: Convert to fraction form
    12,629.12/17,428.80 = 7,040/x
  3. Step 3: Cross multiply
    12,629.12x = 17,428.80 × 7,040
  4. Step 4: Simplify right side
    12,629.12x = 122,698,752
  5. Step 5: Solve for x
    x = 122,698,752/12,629.12
  6. Step 6: Final answer
    x = 9,715.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.