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Finding the Fourth Proportional to 8,858.10, 12,223.80 and 5,078.63

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Solution

The fourth proportional to 8,858.10, 12,223.80 and 5,078.63 is: 7,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,858.10 : 12,223.80 = 5,078.63 : x
  2. Step 2: Convert to fraction form
    8,858.10/12,223.80 = 5,078.63/x
  3. Step 3: Cross multiply
    8,858.10x = 12,223.80 × 5,078.63
  4. Step 4: Simplify right side
    8,858.10x = 62,080,187.95
  5. Step 5: Solve for x
    x = 62,080,187.95/8,858.10
  6. Step 6: Final answer
    x = 7,008.30

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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.