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Finding the Fourth Proportional to 38,812.69, 53,561.03 and 21,819.77

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Solution

The fourth proportional to 38,812.69, 53,561.03 and 21,819.77 is: 30,111.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,812.69 : 53,561.03 = 21,819.77 : x
  2. Step 2: Convert to fraction form
    38,812.69/53,561.03 = 21,819.77/x
  3. Step 3: Cross multiply
    38,812.69x = 53,561.03 × 21,819.77
  4. Step 4: Simplify right side
    38,812.69x = 1,168,689,142.31
  5. Step 5: Solve for x
    x = 1,168,689,142.31/38,812.69
  6. Step 6: Final answer
    x = 30,111.01

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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.