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Finding the Fourth Proportional to 28,515, 39,367.98 and 18,596.28

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Solution

The fourth proportional to 28,515, 39,367.98 and 18,596.28 is: 25,674.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515 : 39,367.98 = 18,596.28 : x
  2. Step 2: Convert to fraction form
    28,515/39,367.98 = 18,596.28/x
  3. Step 3: Cross multiply
    28,515x = 39,367.98 × 18,596.28
  4. Step 4: Simplify right side
    28,515x = 732,097,979.11
  5. Step 5: Solve for x
    x = 732,097,979.11/28,515
  6. Step 6: Final answer
    x = 25,674.14

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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.