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Finding the Fourth Proportional to 8,977.94, 12,389.36 and 4,999.42

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Solution

The fourth proportional to 8,977.94, 12,389.36 and 4,999.42 is: 6,899.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.94 : 12,389.36 = 4,999.42 : x
  2. Step 2: Convert to fraction form
    8,977.94/12,389.36 = 4,999.42/x
  3. Step 3: Cross multiply
    8,977.94x = 12,389.36 × 4,999.42
  4. Step 4: Simplify right side
    8,977.94x = 61,939,604.66
  5. Step 5: Solve for x
    x = 61,939,604.66/8,977.94
  6. Step 6: Final answer
    x = 6,899.09

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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.