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Finding the Fourth Proportional to 8,883.16, 12,256.80 and 5,155

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Solution

The fourth proportional to 8,883.16, 12,256.80 and 5,155 is: 7,112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,883.16 : 12,256.80 = 5,155 : x
  2. Step 2: Convert to fraction form
    8,883.16/12,256.80 = 5,155/x
  3. Step 3: Cross multiply
    8,883.16x = 12,256.80 × 5,155
  4. Step 4: Simplify right side
    8,883.16x = 63,183,804.00
  5. Step 5: Solve for x
    x = 63,183,804.00/8,883.16
  6. Step 6: Final answer
    x = 7,112.76

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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.