Home / 5,415.28-8,120.81-1,665.94

Finding the Fourth Proportional to 5,415.28, 8,120.81 and 1,665.94

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Solution

The fourth proportional to 5,415.28, 8,120.81 and 1,665.94 is: 2,498.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.28 : 8,120.81 = 1,665.94 : x
  2. Step 2: Convert to fraction form
    5,415.28/8,120.81 = 1,665.94/x
  3. Step 3: Cross multiply
    5,415.28x = 8,120.81 × 1,665.94
  4. Step 4: Simplify right side
    5,415.28x = 13,528,794.77
  5. Step 5: Solve for x
    x = 13,528,794.77/5,415.28
  6. Step 6: Final answer
    x = 2,498.26

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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.