Home / 9,785.40-14,678.10-3,211.80

Finding the Fourth Proportional to 9,785.40, 14,678.10 and 3,211.80

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Solution

The fourth proportional to 9,785.40, 14,678.10 and 3,211.80 is: 4,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,785.40 : 14,678.10 = 3,211.80 : x
  2. Step 2: Convert to fraction form
    9,785.40/14,678.10 = 3,211.80/x
  3. Step 3: Cross multiply
    9,785.40x = 14,678.10 × 3,211.80
  4. Step 4: Simplify right side
    9,785.40x = 47,143,121.58
  5. Step 5: Solve for x
    x = 47,143,121.58/9,785.40
  6. Step 6: Final answer
    x = 4,817.70

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Double scale
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Similar ratio
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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.