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Finding the Fourth Proportional to 8,955.58, 13,412.88 and 4,278.88

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Solution

The fourth proportional to 8,955.58, 13,412.88 and 4,278.88 is: 6,408.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.58 : 13,412.88 = 4,278.88 : x
  2. Step 2: Convert to fraction form
    8,955.58/13,412.88 = 4,278.88/x
  3. Step 3: Cross multiply
    8,955.58x = 13,412.88 × 4,278.88
  4. Step 4: Simplify right side
    8,955.58x = 57,392,057.33
  5. Step 5: Solve for x
    x = 57,392,057.33/8,955.58
  6. Step 6: Final answer
    x = 6,408.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.