Home / 4,130.76-5,698.80-2,638.29

Finding the Fourth Proportional to 4,130.76, 5,698.80 and 2,638.29

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Solution

The fourth proportional to 4,130.76, 5,698.80 and 2,638.29 is: 3,639.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,130.76 : 5,698.80 = 2,638.29 : x
  2. Step 2: Convert to fraction form
    4,130.76/5,698.80 = 2,638.29/x
  3. Step 3: Cross multiply
    4,130.76x = 5,698.80 × 2,638.29
  4. Step 4: Simplify right side
    4,130.76x = 15,035,087.05
  5. Step 5: Solve for x
    x = 15,035,087.05/4,130.76
  6. Step 6: Final answer
    x = 3,639.79

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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.