Home / 3,970.68-5,475.76-2,642.08

Finding the Fourth Proportional to 3,970.68, 5,475.76 and 2,642.08

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Solution

The fourth proportional to 3,970.68, 5,475.76 and 2,642.08 is: 3,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.68 : 5,475.76 = 2,642.08 : x
  2. Step 2: Convert to fraction form
    3,970.68/5,475.76 = 2,642.08/x
  3. Step 3: Cross multiply
    3,970.68x = 5,475.76 × 2,642.08
  4. Step 4: Simplify right side
    3,970.68x = 14,467,395.98
  5. Step 5: Solve for x
    x = 14,467,395.98/3,970.68
  6. Step 6: Final answer
    x = 3,643.56

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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.