Home / 28,309.05-39,072.15-21,582.66

Finding the Fourth Proportional to 28,309.05, 39,072.15 and 21,582.66

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Solution

The fourth proportional to 28,309.05, 39,072.15 and 21,582.66 is: 29,788.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.05 : 39,072.15 = 21,582.66 : x
  2. Step 2: Convert to fraction form
    28,309.05/39,072.15 = 21,582.66/x
  3. Step 3: Cross multiply
    28,309.05x = 39,072.15 × 21,582.66
  4. Step 4: Simplify right side
    28,309.05x = 843,280,625.64
  5. Step 5: Solve for x
    x = 843,280,625.64/28,309.05
  6. Step 6: Final answer
    x = 29,788.38

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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.