Home / 2,688.24-3,999.84-2,621.28

Finding the Fourth Proportional to 2,688.24, 3,999.84 and 2,621.28

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Solution

The fourth proportional to 2,688.24, 3,999.84 and 2,621.28 is: 3,900.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.24 : 3,999.84 = 2,621.28 : x
  2. Step 2: Convert to fraction form
    2,688.24/3,999.84 = 2,621.28/x
  3. Step 3: Cross multiply
    2,688.24x = 3,999.84 × 2,621.28
  4. Step 4: Simplify right side
    2,688.24x = 10,484,700.60
  5. Step 5: Solve for x
    x = 10,484,700.60/2,688.24
  6. Step 6: Final answer
    x = 3,900.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.