Home / 5,678.49-8,516.34-1,980.18

Finding the Fourth Proportional to 5,678.49, 8,516.34 and 1,980.18

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Solution

The fourth proportional to 5,678.49, 8,516.34 and 1,980.18 is: 2,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.49 : 8,516.34 = 1,980.18 : x
  2. Step 2: Convert to fraction form
    5,678.49/8,516.34 = 1,980.18/x
  3. Step 3: Cross multiply
    5,678.49x = 8,516.34 × 1,980.18
  4. Step 4: Simplify right side
    5,678.49x = 16,863,886.14
  5. Step 5: Solve for x
    x = 16,863,886.14/5,678.49
  6. Step 6: Final answer
    x = 2,969.78

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Half scale
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Double scale
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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.