Home / 5,423.59-8,129.89-2,135.40

Finding the Fourth Proportional to 5,423.59, 8,129.89 and 2,135.40

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Solution

The fourth proportional to 5,423.59, 8,129.89 and 2,135.40 is: 3,200.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.59 : 8,129.89 = 2,135.40 : x
  2. Step 2: Convert to fraction form
    5,423.59/8,129.89 = 2,135.40/x
  3. Step 3: Cross multiply
    5,423.59x = 8,129.89 × 2,135.40
  4. Step 4: Simplify right side
    5,423.59x = 17,360,567.11
  5. Step 5: Solve for x
    x = 17,360,567.11/5,423.59
  6. Step 6: Final answer
    x = 3,200.94

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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.