Home / 5,378.81-7,420.50-3,883.46

Finding the Fourth Proportional to 5,378.81, 7,420.50 and 3,883.46

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Solution

The fourth proportional to 5,378.81, 7,420.50 and 3,883.46 is: 5,357.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.81 : 7,420.50 = 3,883.46 : x
  2. Step 2: Convert to fraction form
    5,378.81/7,420.50 = 3,883.46/x
  3. Step 3: Cross multiply
    5,378.81x = 7,420.50 × 3,883.46
  4. Step 4: Simplify right side
    5,378.81x = 28,817,177.83
  5. Step 5: Solve for x
    x = 28,817,177.83/5,378.81
  6. Step 6: Final answer
    x = 5,357.54

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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.