Home / 5,143-7,100.40-3,898.84

Finding the Fourth Proportional to 5,143, 7,100.40 and 3,898.84

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Solution

The fourth proportional to 5,143, 7,100.40 and 3,898.84 is: 5,382.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143 : 7,100.40 = 3,898.84 : x
  2. Step 2: Convert to fraction form
    5,143/7,100.40 = 3,898.84/x
  3. Step 3: Cross multiply
    5,143x = 7,100.40 × 3,898.84
  4. Step 4: Simplify right side
    5,143x = 27,683,323.54
  5. Step 5: Solve for x
    x = 27,683,323.54/5,143
  6. Step 6: Final answer
    x = 5,382.72

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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.