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Finding the Fourth Proportional to 28,990.89, 40,007.40 and 16,415.64

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Solution

The fourth proportional to 28,990.89, 40,007.40 and 16,415.64 is: 22,653.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.89 : 40,007.40 = 16,415.64 : x
  2. Step 2: Convert to fraction form
    28,990.89/40,007.40 = 16,415.64/x
  3. Step 3: Cross multiply
    28,990.89x = 40,007.40 × 16,415.64
  4. Step 4: Simplify right side
    28,990.89x = 656,747,075.74
  5. Step 5: Solve for x
    x = 656,747,075.74/28,990.89
  6. Step 6: Final answer
    x = 22,653.57

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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.