Home / 3,128.76-4,318.18-1,869.41

Finding the Fourth Proportional to 3,128.76, 4,318.18 and 1,869.41

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Solution

The fourth proportional to 3,128.76, 4,318.18 and 1,869.41 is: 2,580.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.76 : 4,318.18 = 1,869.41 : x
  2. Step 2: Convert to fraction form
    3,128.76/4,318.18 = 1,869.41/x
  3. Step 3: Cross multiply
    3,128.76x = 4,318.18 × 1,869.41
  4. Step 4: Simplify right side
    3,128.76x = 8,072,455.00
  5. Step 5: Solve for x
    x = 8,072,455.00/3,128.76
  6. Step 6: Final answer
    x = 2,580.08

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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.