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Finding the Fourth Proportional to 8,890.56, 12,270.56 and 5,305.77

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Solution

The fourth proportional to 8,890.56, 12,270.56 and 5,305.77 is: 7,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,890.56 : 12,270.56 = 5,305.77 : x
  2. Step 2: Convert to fraction form
    8,890.56/12,270.56 = 5,305.77/x
  3. Step 3: Cross multiply
    8,890.56x = 12,270.56 × 5,305.77
  4. Step 4: Simplify right side
    8,890.56x = 65,104,742.60
  5. Step 5: Solve for x
    x = 65,104,742.60/8,890.56
  6. Step 6: Final answer
    x = 7,322.91

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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.