Home / 28,919.45-39,913.13-18,310.07

Finding the Fourth Proportional to 28,919.45, 39,913.13 and 18,310.07

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Solution

The fourth proportional to 28,919.45, 39,913.13 and 18,310.07 is: 25,270.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.45 : 39,913.13 = 18,310.07 : x
  2. Step 2: Convert to fraction form
    28,919.45/39,913.13 = 18,310.07/x
  3. Step 3: Cross multiply
    28,919.45x = 39,913.13 × 18,310.07
  4. Step 4: Simplify right side
    28,919.45x = 730,812,349.78
  5. Step 5: Solve for x
    x = 730,812,349.78/28,919.45
  6. Step 6: Final answer
    x = 25,270.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.