Home / 5,228.71-7,215.51-2,870.80

Finding the Fourth Proportional to 5,228.71, 7,215.51 and 2,870.80

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Solution

The fourth proportional to 5,228.71, 7,215.51 and 2,870.80 is: 3,961.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.71 : 7,215.51 = 2,870.80 : x
  2. Step 2: Convert to fraction form
    5,228.71/7,215.51 = 2,870.80/x
  3. Step 3: Cross multiply
    5,228.71x = 7,215.51 × 2,870.80
  4. Step 4: Simplify right side
    5,228.71x = 20,714,286.11
  5. Step 5: Solve for x
    x = 20,714,286.11/5,228.71
  6. Step 6: Final answer
    x = 3,961.64

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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.