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Finding the Fourth Proportional to 12,125.89, 16,731.93 and 6,820.39

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Solution

The fourth proportional to 12,125.89, 16,731.93 and 6,820.39 is: 9,411.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.89 : 16,731.93 = 6,820.39 : x
  2. Step 2: Convert to fraction form
    12,125.89/16,731.93 = 6,820.39/x
  3. Step 3: Cross multiply
    12,125.89x = 16,731.93 × 6,820.39
  4. Step 4: Simplify right side
    12,125.89x = 114,118,288.05
  5. Step 5: Solve for x
    x = 114,118,288.05/12,125.89
  6. Step 6: Final answer
    x = 9,411.13

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Double scale
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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.