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Finding the Fourth Proportional to 7,894.39, 10,898.19 and 4,911.18

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Solution

The fourth proportional to 7,894.39, 10,898.19 and 4,911.18 is: 6,779.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.39 : 10,898.19 = 4,911.18 : x
  2. Step 2: Convert to fraction form
    7,894.39/10,898.19 = 4,911.18/x
  3. Step 3: Cross multiply
    7,894.39x = 10,898.19 × 4,911.18
  4. Step 4: Simplify right side
    7,894.39x = 53,522,972.76
  5. Step 5: Solve for x
    x = 53,522,972.76/7,894.39
  6. Step 6: Final answer
    x = 6,779.88

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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.