Home / 5,390.32-7,438.72-3,153.80

Finding the Fourth Proportional to 5,390.32, 7,438.72 and 3,153.80

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Solution

The fourth proportional to 5,390.32, 7,438.72 and 3,153.80 is: 4,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.32 : 7,438.72 = 3,153.80 : x
  2. Step 2: Convert to fraction form
    5,390.32/7,438.72 = 3,153.80/x
  3. Step 3: Cross multiply
    5,390.32x = 7,438.72 × 3,153.80
  4. Step 4: Simplify right side
    5,390.32x = 23,460,235.14
  5. Step 5: Solve for x
    x = 23,460,235.14/5,390.32
  6. Step 6: Final answer
    x = 4,352.29

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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.