Home / 5,228.81-7,215.76-2,871.10

Finding the Fourth Proportional to 5,228.81, 7,215.76 and 2,871.10

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Solution

The fourth proportional to 5,228.81, 7,215.76 and 2,871.10 is: 3,962.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,228.81 : 7,215.76 = 2,871.10 : x
  2. Step 2: Convert to fraction form
    5,228.81/7,215.76 = 2,871.10/x
  3. Step 3: Cross multiply
    5,228.81x = 7,215.76 × 2,871.10
  4. Step 4: Simplify right side
    5,228.81x = 20,717,168.54
  5. Step 5: Solve for x
    x = 20,717,168.54/5,228.81
  6. Step 6: Final answer
    x = 3,962.12

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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.