Home / 5,390.24-7,438.92-3,897.68

Finding the Fourth Proportional to 5,390.24, 7,438.92 and 3,897.68

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Solution

The fourth proportional to 5,390.24, 7,438.92 and 3,897.68 is: 5,379.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.24 : 7,438.92 = 3,897.68 : x
  2. Step 2: Convert to fraction form
    5,390.24/7,438.92 = 3,897.68/x
  3. Step 3: Cross multiply
    5,390.24x = 7,438.92 × 3,897.68
  4. Step 4: Simplify right side
    5,390.24x = 28,994,529.71
  5. Step 5: Solve for x
    x = 28,994,529.71/5,390.24
  6. Step 6: Final answer
    x = 5,379.08

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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.