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Finding the Fourth Proportional to 8,926.63, 12,319.27 and 5,390.37

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Solution

The fourth proportional to 8,926.63, 12,319.27 and 5,390.37 is: 7,439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,926.63 : 12,319.27 = 5,390.37 : x
  2. Step 2: Convert to fraction form
    8,926.63/12,319.27 = 5,390.37/x
  3. Step 3: Cross multiply
    8,926.63x = 12,319.27 × 5,390.37
  4. Step 4: Simplify right side
    8,926.63x = 66,405,409.95
  5. Step 5: Solve for x
    x = 66,405,409.95/8,926.63
  6. Step 6: Final answer
    x = 7,439.03

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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.