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Finding the Fourth Proportional to 9,038.39, 13,558.79 and 8,491.64

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Solution

The fourth proportional to 9,038.39, 13,558.79 and 8,491.64 is: 12,738.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,038.39 : 13,558.79 = 8,491.64 : x
  2. Step 2: Convert to fraction form
    9,038.39/13,558.79 = 8,491.64/x
  3. Step 3: Cross multiply
    9,038.39x = 13,558.79 × 8,491.64
  4. Step 4: Simplify right side
    9,038.39x = 115,136,316.95
  5. Step 5: Solve for x
    x = 115,136,316.95/9,038.39
  6. Step 6: Final answer
    x = 12,738.59

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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.