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Finding the Fourth Proportional to 8,989.18, 12,405.07 and 5,213.07

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Solution

The fourth proportional to 8,989.18, 12,405.07 and 5,213.07 is: 7,194.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.18 : 12,405.07 = 5,213.07 : x
  2. Step 2: Convert to fraction form
    8,989.18/12,405.07 = 5,213.07/x
  3. Step 3: Cross multiply
    8,989.18x = 12,405.07 × 5,213.07
  4. Step 4: Simplify right side
    8,989.18x = 64,668,536.89
  5. Step 5: Solve for x
    x = 64,668,536.89/8,989.18
  6. Step 6: Final answer
    x = 7,194.04

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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.