Home / 12,186.98-16,817.18-6,880.76

Finding the Fourth Proportional to 12,186.98, 16,817.18 and 6,880.76

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Solution

The fourth proportional to 12,186.98, 16,817.18 and 6,880.76 is: 9,494.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.98 : 16,817.18 = 6,880.76 : x
  2. Step 2: Convert to fraction form
    12,186.98/16,817.18 = 6,880.76/x
  3. Step 3: Cross multiply
    12,186.98x = 16,817.18 × 6,880.76
  4. Step 4: Simplify right side
    12,186.98x = 115,714,979.46
  5. Step 5: Solve for x
    x = 115,714,979.46/12,186.98
  6. Step 6: Final answer
    x = 9,494.97

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Half scale
Find fourth proportional to 24,373.96, 33,634.36 and 13,761.52
Double scale
Find fourth proportional to 12,187.98, 16,818.56 and 6,881.76
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.