Home / 20,664.64-28,518.16-11,712.48

Finding the Fourth Proportional to 20,664.64, 28,518.16 and 11,712.48

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Solution

The fourth proportional to 20,664.64, 28,518.16 and 11,712.48 is: 16,163.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.64 : 28,518.16 = 11,712.48 : x
  2. Step 2: Convert to fraction form
    20,664.64/28,518.16 = 11,712.48/x
  3. Step 3: Cross multiply
    20,664.64x = 28,518.16 × 11,712.48
  4. Step 4: Simplify right side
    20,664.64x = 334,018,378.64
  5. Step 5: Solve for x
    x = 334,018,378.64/20,664.64
  6. Step 6: Final answer
    x = 16,163.76

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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.