Home / 4,812.78-6,641.60-2,688.19

Finding the Fourth Proportional to 4,812.78, 6,641.60 and 2,688.19

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Solution

The fourth proportional to 4,812.78, 6,641.60 and 2,688.19 is: 3,709.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,812.78 : 6,641.60 = 2,688.19 : x
  2. Step 2: Convert to fraction form
    4,812.78/6,641.60 = 2,688.19/x
  3. Step 3: Cross multiply
    4,812.78x = 6,641.60 × 2,688.19
  4. Step 4: Simplify right side
    4,812.78x = 17,853,852.66
  5. Step 5: Solve for x
    x = 17,853,852.66/4,812.78
  6. Step 6: Final answer
    x = 3,709.67

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.