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Finding the Fourth Proportional to 8,690.76, 11,999 and 5,384.52

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Solution

The fourth proportional to 8,690.76, 11,999 and 5,384.52 is: 7,434.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.76 : 11,999 = 5,384.52 : x
  2. Step 2: Convert to fraction form
    8,690.76/11,999 = 5,384.52/x
  3. Step 3: Cross multiply
    8,690.76x = 11,999 × 5,384.52
  4. Step 4: Simplify right side
    8,690.76x = 64,608,855.48
  5. Step 5: Solve for x
    x = 64,608,855.48/8,690.76
  6. Step 6: Final answer
    x = 7,434.20

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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.