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Finding the Fourth Proportional to 12,610, 17,401.80 and 7,021.36

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Solution

The fourth proportional to 12,610, 17,401.80 and 7,021.36 is: 9,689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,610 : 17,401.80 = 7,021.36 : x
  2. Step 2: Convert to fraction form
    12,610/17,401.80 = 7,021.36/x
  3. Step 3: Cross multiply
    12,610x = 17,401.80 × 7,021.36
  4. Step 4: Simplify right side
    12,610x = 122,184,302.45
  5. Step 5: Solve for x
    x = 122,184,302.45/12,610
  6. Step 6: Final answer
    x = 9,689.48

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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.