Home / 3,038.09-4,191.40-1,918.60

Finding the Fourth Proportional to 3,038.09, 4,191.40 and 1,918.60

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Solution

The fourth proportional to 3,038.09, 4,191.40 and 1,918.60 is: 2,646.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,038.09 : 4,191.40 = 1,918.60 : x
  2. Step 2: Convert to fraction form
    3,038.09/4,191.40 = 1,918.60/x
  3. Step 3: Cross multiply
    3,038.09x = 4,191.40 × 1,918.60
  4. Step 4: Simplify right side
    3,038.09x = 8,041,604.77
  5. Step 5: Solve for x
    x = 8,041,604.77/3,038.09
  6. Step 6: Final answer
    x = 2,646.93

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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.