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Finding the Fourth Proportional to 13,998.60, 19,316.60 and 8,620.16

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Solution

The fourth proportional to 13,998.60, 19,316.60 and 8,620.16 is: 11,894.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.60 : 19,316.60 = 8,620.16 : x
  2. Step 2: Convert to fraction form
    13,998.60/19,316.60 = 8,620.16/x
  3. Step 3: Cross multiply
    13,998.60x = 19,316.60 × 8,620.16
  4. Step 4: Simplify right side
    13,998.60x = 166,512,182.66
  5. Step 5: Solve for x
    x = 166,512,182.66/13,998.60
  6. Step 6: Final answer
    x = 11,894.92

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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.