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Finding the Fourth Proportional to 8,478.72, 11,698.20 and 4,941.24

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Solution

The fourth proportional to 8,478.72, 11,698.20 and 4,941.24 is: 6,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.72 : 11,698.20 = 4,941.24 : x
  2. Step 2: Convert to fraction form
    8,478.72/11,698.20 = 4,941.24/x
  3. Step 3: Cross multiply
    8,478.72x = 11,698.20 × 4,941.24
  4. Step 4: Simplify right side
    8,478.72x = 57,803,613.77
  5. Step 5: Solve for x
    x = 57,803,613.77/8,478.72
  6. Step 6: Final answer
    x = 6,817.49

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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.