Home / 2,820.64-3,890.32-2,037.28

Finding the Fourth Proportional to 2,820.64, 3,890.32 and 2,037.28

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Solution

The fourth proportional to 2,820.64, 3,890.32 and 2,037.28 is: 2,809.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.64 : 3,890.32 = 2,037.28 : x
  2. Step 2: Convert to fraction form
    2,820.64/3,890.32 = 2,037.28/x
  3. Step 3: Cross multiply
    2,820.64x = 3,890.32 × 2,037.28
  4. Step 4: Simplify right side
    2,820.64x = 7,925,671.13
  5. Step 5: Solve for x
    x = 7,925,671.13/2,820.64
  6. Step 6: Final answer
    x = 2,809.88

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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.