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Finding the Fourth Proportional to 3,518.76, 4,855.70 and 1,946.76

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Solution

The fourth proportional to 3,518.76, 4,855.70 and 1,946.76 is: 2,686.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.76 : 4,855.70 = 1,946.76 : x
  2. Step 2: Convert to fraction form
    3,518.76/4,855.70 = 1,946.76/x
  3. Step 3: Cross multiply
    3,518.76x = 4,855.70 × 1,946.76
  4. Step 4: Simplify right side
    3,518.76x = 9,452,882.53
  5. Step 5: Solve for x
    x = 9,452,882.53/3,518.76
  6. Step 6: Final answer
    x = 2,686.42

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Half scale
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Double scale
Find fourth proportional to 3,519.76, 4,857.08 and 1,947.76
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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.