Home / 14,259.28-21,390-3,871.12

Finding the Fourth Proportional to 14,259.28, 21,390 and 3,871.12

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Solution

The fourth proportional to 14,259.28, 21,390 and 3,871.12 is: 5,806.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,259.28 : 21,390 = 3,871.12 : x
  2. Step 2: Convert to fraction form
    14,259.28/21,390 = 3,871.12/x
  3. Step 3: Cross multiply
    14,259.28x = 21,390 × 3,871.12
  4. Step 4: Simplify right side
    14,259.28x = 82,803,256.80
  5. Step 5: Solve for x
    x = 82,803,256.80/14,259.28
  6. Step 6: Final answer
    x = 5,806.97

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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.