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Finding the Fourth Proportional to 8,656.80, 11,946.63 and 5,118.72

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Solution

The fourth proportional to 8,656.80, 11,946.63 and 5,118.72 is: 7,063.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.80 : 11,946.63 = 5,118.72 : x
  2. Step 2: Convert to fraction form
    8,656.80/11,946.63 = 5,118.72/x
  3. Step 3: Cross multiply
    8,656.80x = 11,946.63 × 5,118.72
  4. Step 4: Simplify right side
    8,656.80x = 61,151,453.91
  5. Step 5: Solve for x
    x = 61,151,453.91/8,656.80
  6. Step 6: Final answer
    x = 7,063.98

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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.