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Finding the Fourth Proportional to 8,518.76, 12,708.27 and 7,922.19

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Solution

The fourth proportional to 8,518.76, 12,708.27 and 7,922.19 is: 11,818.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.76 : 12,708.27 = 7,922.19 : x
  2. Step 2: Convert to fraction form
    8,518.76/12,708.27 = 7,922.19/x
  3. Step 3: Cross multiply
    8,518.76x = 12,708.27 × 7,922.19
  4. Step 4: Simplify right side
    8,518.76x = 100,677,329.51
  5. Step 5: Solve for x
    x = 100,677,329.51/8,518.76
  6. Step 6: Final answer
    x = 11,818.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.