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Finding the Fourth Proportional to 9,238.63, 12,745.53 and 6,821.78

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Solution

The fourth proportional to 9,238.63, 12,745.53 and 6,821.78 is: 9,411.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,238.63 : 12,745.53 = 6,821.78 : x
  2. Step 2: Convert to fraction form
    9,238.63/12,745.53 = 6,821.78/x
  3. Step 3: Cross multiply
    9,238.63x = 12,745.53 × 6,821.78
  4. Step 4: Simplify right side
    9,238.63x = 86,947,264.36
  5. Step 5: Solve for x
    x = 86,947,264.36/9,238.63
  6. Step 6: Final answer
    x = 9,411.27

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Half scale
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Double scale
Find fourth proportional to 9,239.63, 12,746.91 and 6,822.78
Similar ratio
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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.