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Finding the Fourth Proportional to 8,658.85, 12,989.67 and 3,038.08

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Solution

The fourth proportional to 8,658.85, 12,989.67 and 3,038.08 is: 4,557.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.85 : 12,989.67 = 3,038.08 : x
  2. Step 2: Convert to fraction form
    8,658.85/12,989.67 = 3,038.08/x
  3. Step 3: Cross multiply
    8,658.85x = 12,989.67 × 3,038.08
  4. Step 4: Simplify right side
    8,658.85x = 39,463,656.63
  5. Step 5: Solve for x
    x = 39,463,656.63/8,658.85
  6. Step 6: Final answer
    x = 4,557.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.