Home / 18,911.72-28,367.39-4,871.69

Finding the Fourth Proportional to 18,911.72, 28,367.39 and 4,871.69

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Solution

The fourth proportional to 18,911.72, 28,367.39 and 4,871.69 is: 7,307.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.72 : 28,367.39 = 4,871.69 : x
  2. Step 2: Convert to fraction form
    18,911.72/28,367.39 = 4,871.69/x
  3. Step 3: Cross multiply
    18,911.72x = 28,367.39 × 4,871.69
  4. Step 4: Simplify right side
    18,911.72x = 138,197,176.75
  5. Step 5: Solve for x
    x = 138,197,176.75/18,911.72
  6. Step 6: Final answer
    x = 7,307.49

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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.