Home / 3,126.24-4,312.98-2,181.78

Finding the Fourth Proportional to 3,126.24, 4,312.98 and 2,181.78

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Solution

The fourth proportional to 3,126.24, 4,312.98 and 2,181.78 is: 3,010.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.24 : 4,312.98 = 2,181.78 : x
  2. Step 2: Convert to fraction form
    3,126.24/4,312.98 = 2,181.78/x
  3. Step 3: Cross multiply
    3,126.24x = 4,312.98 × 2,181.78
  4. Step 4: Simplify right side
    3,126.24x = 9,409,973.50
  5. Step 5: Solve for x
    x = 9,409,973.50/3,126.24
  6. Step 6: Final answer
    x = 3,010.00

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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.