Home / 28,919.89-39,913.73-18,310.51

Finding the Fourth Proportional to 28,919.89, 39,913.73 and 18,310.51

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Solution

The fourth proportional to 28,919.89, 39,913.73 and 18,310.51 is: 25,271.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.89 : 39,913.73 = 18,310.51 : x
  2. Step 2: Convert to fraction form
    28,919.89/39,913.73 = 18,310.51/x
  3. Step 3: Cross multiply
    28,919.89x = 39,913.73 × 18,310.51
  4. Step 4: Simplify right side
    28,919.89x = 730,840,752.30
  5. Step 5: Solve for x
    x = 730,840,752.30/28,919.89
  6. Step 6: Final answer
    x = 25,271.21

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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.