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Finding the Fourth Proportional to 7,619.10, 10,518.18 and 7,212.12

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Solution

The fourth proportional to 7,619.10, 10,518.18 and 7,212.12 is: 9,956.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,619.10 : 10,518.18 = 7,212.12 : x
  2. Step 2: Convert to fraction form
    7,619.10/10,518.18 = 7,212.12/x
  3. Step 3: Cross multiply
    7,619.10x = 10,518.18 × 7,212.12
  4. Step 4: Simplify right side
    7,619.10x = 75,858,376.34
  5. Step 5: Solve for x
    x = 75,858,376.34/7,619.10
  6. Step 6: Final answer
    x = 9,956.34

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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.