Home / 5,384.80-7,420.12-3,887.92

Finding the Fourth Proportional to 5,384.80, 7,420.12 and 3,887.92

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Solution

The fourth proportional to 5,384.80, 7,420.12 and 3,887.92 is: 5,357.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,384.80 : 7,420.12 = 3,887.92 : x
  2. Step 2: Convert to fraction form
    5,384.80/7,420.12 = 3,887.92/x
  3. Step 3: Cross multiply
    5,384.80x = 7,420.12 × 3,887.92
  4. Step 4: Simplify right side
    5,384.80x = 28,848,832.95
  5. Step 5: Solve for x
    x = 28,848,832.95/5,384.80
  6. Step 6: Final answer
    x = 5,357.46

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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.