Home / 5,420.28-8,130.71-1,722.81

Finding the Fourth Proportional to 5,420.28, 8,130.71 and 1,722.81

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Solution

The fourth proportional to 5,420.28, 8,130.71 and 1,722.81 is: 2,584.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.28 : 8,130.71 = 1,722.81 : x
  2. Step 2: Convert to fraction form
    5,420.28/8,130.71 = 1,722.81/x
  3. Step 3: Cross multiply
    5,420.28x = 8,130.71 × 1,722.81
  4. Step 4: Simplify right side
    5,420.28x = 14,007,668.50
  5. Step 5: Solve for x
    x = 14,007,668.50/5,420.28
  6. Step 6: Final answer
    x = 2,584.31

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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.