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Finding the Fourth Proportional to 28,684.94, 42,998.45 and 9,955.71

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Solution

The fourth proportional to 28,684.94, 42,998.45 and 9,955.71 is: 14,923.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,684.94 : 42,998.45 = 9,955.71 : x
  2. Step 2: Convert to fraction form
    28,684.94/42,998.45 = 9,955.71/x
  3. Step 3: Cross multiply
    28,684.94x = 42,998.45 × 9,955.71
  4. Step 4: Simplify right side
    28,684.94x = 428,080,048.87
  5. Step 5: Solve for x
    x = 428,080,048.87/28,684.94
  6. Step 6: Final answer
    x = 14,923.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.