Home / 39,783.34-54,900.29-21,878.39

Finding the Fourth Proportional to 39,783.34, 54,900.29 and 21,878.39

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Solution

The fourth proportional to 39,783.34, 54,900.29 and 21,878.39 is: 30,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.34 : 54,900.29 = 21,878.39 : x
  2. Step 2: Convert to fraction form
    39,783.34/54,900.29 = 21,878.39/x
  3. Step 3: Cross multiply
    39,783.34x = 54,900.29 × 21,878.39
  4. Step 4: Simplify right side
    39,783.34x = 1,201,129,846.34
  5. Step 5: Solve for x
    x = 1,201,129,846.34/39,783.34
  6. Step 6: Final answer
    x = 30,191.78

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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.