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Finding the Fourth Proportional to 12,555.71, 18,849.96 and 10,620.21

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Solution

The fourth proportional to 12,555.71, 18,849.96 and 10,620.21 is: 15,944.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.71 : 18,849.96 = 10,620.21 : x
  2. Step 2: Convert to fraction form
    12,555.71/18,849.96 = 10,620.21/x
  3. Step 3: Cross multiply
    12,555.71x = 18,849.96 × 10,620.21
  4. Step 4: Simplify right side
    12,555.71x = 200,190,533.69
  5. Step 5: Solve for x
    x = 200,190,533.69/12,555.71
  6. Step 6: Final answer
    x = 15,944.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.