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Finding the Fourth Proportional to 28,500, 39,329.28 and 15,924.84

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Solution

The fourth proportional to 28,500, 39,329.28 and 15,924.84 is: 21,975.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,500 : 39,329.28 = 15,924.84 : x
  2. Step 2: Convert to fraction form
    28,500/39,329.28 = 15,924.84/x
  3. Step 3: Cross multiply
    28,500x = 39,329.28 × 15,924.84
  4. Step 4: Simplify right side
    28,500x = 626,312,491.32
  5. Step 5: Solve for x
    x = 626,312,491.32/28,500
  6. Step 6: Final answer
    x = 21,975.88

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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.