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Finding the Fourth Proportional to 8,977.86, 12,389.42 and 4,998.89

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Solution

The fourth proportional to 8,977.86, 12,389.42 and 4,998.89 is: 6,898.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.86 : 12,389.42 = 4,998.89 : x
  2. Step 2: Convert to fraction form
    8,977.86/12,389.42 = 4,998.89/x
  3. Step 3: Cross multiply
    8,977.86x = 12,389.42 × 4,998.89
  4. Step 4: Simplify right side
    8,977.86x = 61,933,391.21
  5. Step 5: Solve for x
    x = 61,933,391.21/8,977.86
  6. Step 6: Final answer
    x = 6,898.46

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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.