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Finding the Fourth Proportional to 13,902.76, 19,187.76 and 8,865.37

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Solution

The fourth proportional to 13,902.76, 19,187.76 and 8,865.37 is: 12,235.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,902.76 : 19,187.76 = 8,865.37 : x
  2. Step 2: Convert to fraction form
    13,902.76/19,187.76 = 8,865.37/x
  3. Step 3: Cross multiply
    13,902.76x = 19,187.76 × 8,865.37
  4. Step 4: Simplify right side
    13,902.76x = 170,106,591.87
  5. Step 5: Solve for x
    x = 170,106,591.87/13,902.76
  6. Step 6: Final answer
    x = 12,235.45

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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.