Home / 3,128.54-4,316.63-1,948.77

Finding the Fourth Proportional to 3,128.54, 4,316.63 and 1,948.77

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Solution

The fourth proportional to 3,128.54, 4,316.63 and 1,948.77 is: 2,688.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.54 : 4,316.63 = 1,948.77 : x
  2. Step 2: Convert to fraction form
    3,128.54/4,316.63 = 1,948.77/x
  3. Step 3: Cross multiply
    3,128.54x = 4,316.63 × 1,948.77
  4. Step 4: Simplify right side
    3,128.54x = 8,412,109.30
  5. Step 5: Solve for x
    x = 8,412,109.30/3,128.54
  6. Step 6: Final answer
    x = 2,688.83

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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.