Home / 13,712.22-18,921.12-8,042.76

Finding the Fourth Proportional to 13,712.22, 18,921.12 and 8,042.76

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Solution

The fourth proportional to 13,712.22, 18,921.12 and 8,042.76 is: 11,097.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,712.22 : 18,921.12 = 8,042.76 : x
  2. Step 2: Convert to fraction form
    13,712.22/18,921.12 = 8,042.76/x
  3. Step 3: Cross multiply
    13,712.22x = 18,921.12 × 8,042.76
  4. Step 4: Simplify right side
    13,712.22x = 152,178,027.09
  5. Step 5: Solve for x
    x = 152,178,027.09/13,712.22
  6. Step 6: Final answer
    x = 11,097.99

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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.