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Finding the Fourth Proportional to 28,911, 39,900.42 and 16,336.56

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Solution

The fourth proportional to 28,911, 39,900.42 and 16,336.56 is: 22,546.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,911 : 39,900.42 = 16,336.56 : x
  2. Step 2: Convert to fraction form
    28,911/39,900.42 = 16,336.56/x
  3. Step 3: Cross multiply
    28,911x = 39,900.42 × 16,336.56
  4. Step 4: Simplify right side
    28,911x = 651,835,605.36
  5. Step 5: Solve for x
    x = 651,835,605.36/28,911
  6. Step 6: Final answer
    x = 22,546.28

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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.