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Finding the Fourth Proportional to 8,245.63, 12,368.46 and 5,139.42

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Solution

The fourth proportional to 8,245.63, 12,368.46 and 5,139.42 is: 7,709.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,245.63 : 12,368.46 = 5,139.42 : x
  2. Step 2: Convert to fraction form
    8,245.63/12,368.46 = 5,139.42/x
  3. Step 3: Cross multiply
    8,245.63x = 12,368.46 × 5,139.42
  4. Step 4: Simplify right side
    8,245.63x = 63,566,683.58
  5. Step 5: Solve for x
    x = 63,566,683.58/8,245.63
  6. Step 6: Final answer
    x = 7,709.13

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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.