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Finding the Fourth Proportional to 12,579.86, 17,360.29 and 7,866.90

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Solution

The fourth proportional to 12,579.86, 17,360.29 and 7,866.90 is: 10,856.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.86 : 17,360.29 = 7,866.90 : x
  2. Step 2: Convert to fraction form
    12,579.86/17,360.29 = 7,866.90/x
  3. Step 3: Cross multiply
    12,579.86x = 17,360.29 × 7,866.90
  4. Step 4: Simplify right side
    12,579.86x = 136,571,665.40
  5. Step 5: Solve for x
    x = 136,571,665.40/12,579.86
  6. Step 6: Final answer
    x = 10,856.37

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1.5x scale

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.