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Finding the Fourth Proportional to 18,992.36, 28,491.28 and 6,515.53

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Solution

The fourth proportional to 18,992.36, 28,491.28 and 6,515.53 is: 9,774.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.36 : 28,491.28 = 6,515.53 : x
  2. Step 2: Convert to fraction form
    18,992.36/28,491.28 = 6,515.53/x
  3. Step 3: Cross multiply
    18,992.36x = 28,491.28 × 6,515.53
  4. Step 4: Simplify right side
    18,992.36x = 185,635,789.58
  5. Step 5: Solve for x
    x = 185,635,789.58/18,992.36
  6. Step 6: Final answer
    x = 9,774.23

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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.