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Finding the Fourth Proportional to 28,990.63, 40,007.07 and 16,415.38

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Solution

The fourth proportional to 28,990.63, 40,007.07 and 16,415.38 is: 22,653.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.63 : 40,007.07 = 16,415.38 : x
  2. Step 2: Convert to fraction form
    28,990.63/40,007.07 = 16,415.38/x
  3. Step 3: Cross multiply
    28,990.63x = 40,007.07 × 16,415.38
  4. Step 4: Simplify right side
    28,990.63x = 656,730,974.62
  5. Step 5: Solve for x
    x = 656,730,974.62/28,990.63
  6. Step 6: Final answer
    x = 22,653.22

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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.