Home / 5,415.39-8,125.15-1,905.76

Finding the Fourth Proportional to 5,415.39, 8,125.15 and 1,905.76

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Solution

The fourth proportional to 5,415.39, 8,125.15 and 1,905.76 is: 2,859.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.39 : 8,125.15 = 1,905.76 : x
  2. Step 2: Convert to fraction form
    5,415.39/8,125.15 = 1,905.76/x
  3. Step 3: Cross multiply
    5,415.39x = 8,125.15 × 1,905.76
  4. Step 4: Simplify right side
    5,415.39x = 15,484,585.86
  5. Step 5: Solve for x
    x = 15,484,585.86/5,415.39
  6. Step 6: Final answer
    x = 2,859.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.