Home / 28,385.63-39,173.39-15,810.38

Finding the Fourth Proportional to 28,385.63, 39,173.39 and 15,810.38

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Solution

The fourth proportional to 28,385.63, 39,173.39 and 15,810.38 is: 21,819.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.63 : 39,173.39 = 15,810.38 : x
  2. Step 2: Convert to fraction form
    28,385.63/39,173.39 = 15,810.38/x
  3. Step 3: Cross multiply
    28,385.63x = 39,173.39 × 15,810.38
  4. Step 4: Simplify right side
    28,385.63x = 619,345,906.87
  5. Step 5: Solve for x
    x = 619,345,906.87/28,385.63
  6. Step 6: Final answer
    x = 21,819.00

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Double scale
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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.