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Finding the Fourth Proportional to 8,339.76, 12,510.86 and 3,146.84

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Solution

The fourth proportional to 8,339.76, 12,510.86 and 3,146.84 is: 4,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,339.76 : 12,510.86 = 3,146.84 : x
  2. Step 2: Convert to fraction form
    8,339.76/12,510.86 = 3,146.84/x
  3. Step 3: Cross multiply
    8,339.76x = 12,510.86 × 3,146.84
  4. Step 4: Simplify right side
    8,339.76x = 39,369,674.68
  5. Step 5: Solve for x
    x = 39,369,674.68/8,339.76
  6. Step 6: Final answer
    x = 4,720.72

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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.