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Finding the Fourth Proportional to 8,905.30, 13,357.95 and 8,775.70

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Solution

The fourth proportional to 8,905.30, 13,357.95 and 8,775.70 is: 13,163.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.30 : 13,357.95 = 8,775.70 : x
  2. Step 2: Convert to fraction form
    8,905.30/13,357.95 = 8,775.70/x
  3. Step 3: Cross multiply
    8,905.30x = 13,357.95 × 8,775.70
  4. Step 4: Simplify right side
    8,905.30x = 117,225,361.82
  5. Step 5: Solve for x
    x = 117,225,361.82/8,905.30
  6. Step 6: Final answer
    x = 13,163.55

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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.