Home / 5,421.88-8,124.72-4,871.08

Finding the Fourth Proportional to 5,421.88, 8,124.72 and 4,871.08

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Solution

The fourth proportional to 5,421.88, 8,124.72 and 4,871.08 is: 7,299.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.88 : 8,124.72 = 4,871.08 : x
  2. Step 2: Convert to fraction form
    5,421.88/8,124.72 = 4,871.08/x
  3. Step 3: Cross multiply
    5,421.88x = 8,124.72 × 4,871.08
  4. Step 4: Simplify right side
    5,421.88x = 39,576,161.10
  5. Step 5: Solve for x
    x = 39,576,161.10/5,421.88
  6. Step 6: Final answer
    x = 7,299.34

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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.