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Finding the Fourth Proportional to 8,790.20, 13,153 and 8,315.24

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Solution

The fourth proportional to 8,790.20, 13,153 and 8,315.24 is: 12,442.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,790.20 : 13,153 = 8,315.24 : x
  2. Step 2: Convert to fraction form
    8,790.20/13,153 = 8,315.24/x
  3. Step 3: Cross multiply
    8,790.20x = 13,153 × 8,315.24
  4. Step 4: Simplify right side
    8,790.20x = 109,370,351.72
  5. Step 5: Solve for x
    x = 109,370,351.72/8,790.20
  6. Step 6: Final answer
    x = 12,442.31

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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.