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Finding the Fourth Proportional to 28,659.84, 39,550.95 and 15,913.32

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Solution

The fourth proportional to 28,659.84, 39,550.95 and 15,913.32 is: 21,960.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,659.84 : 39,550.95 = 15,913.32 : x
  2. Step 2: Convert to fraction form
    28,659.84/39,550.95 = 15,913.32/x
  3. Step 3: Cross multiply
    28,659.84x = 39,550.95 × 15,913.32
  4. Step 4: Simplify right side
    28,659.84x = 629,386,923.65
  5. Step 5: Solve for x
    x = 629,386,923.65/28,659.84
  6. Step 6: Final answer
    x = 21,960.59

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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.