Home / 3,126.80-4,313.40-1,948.16

Finding the Fourth Proportional to 3,126.80, 4,313.40 and 1,948.16

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Solution

The fourth proportional to 3,126.80, 4,313.40 and 1,948.16 is: 2,687.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.80 : 4,313.40 = 1,948.16 : x
  2. Step 2: Convert to fraction form
    3,126.80/4,313.40 = 1,948.16/x
  3. Step 3: Cross multiply
    3,126.80x = 4,313.40 × 1,948.16
  4. Step 4: Simplify right side
    3,126.80x = 8,403,193.34
  5. Step 5: Solve for x
    x = 8,403,193.34/3,126.80
  6. Step 6: Final answer
    x = 2,687.47

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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.