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Finding the Fourth Proportional to 8,980.73, 12,389.12 and 6,977.58

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Solution

The fourth proportional to 8,980.73, 12,389.12 and 6,977.58 is: 9,625.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.73 : 12,389.12 = 6,977.58 : x
  2. Step 2: Convert to fraction form
    8,980.73/12,389.12 = 6,977.58/x
  3. Step 3: Cross multiply
    8,980.73x = 12,389.12 × 6,977.58
  4. Step 4: Simplify right side
    8,980.73x = 86,446,010.07
  5. Step 5: Solve for x
    x = 86,446,010.07/8,980.73
  6. Step 6: Final answer
    x = 9,625.72

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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.