Home / 39,808.86-54,937.53-21,905.16

Finding the Fourth Proportional to 39,808.86, 54,937.53 and 21,905.16

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Solution

The fourth proportional to 39,808.86, 54,937.53 and 21,905.16 is: 30,229.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,808.86 : 54,937.53 = 21,905.16 : x
  2. Step 2: Convert to fraction form
    39,808.86/54,937.53 = 21,905.16/x
  3. Step 3: Cross multiply
    39,808.86x = 54,937.53 × 21,905.16
  4. Step 4: Simplify right side
    39,808.86x = 1,203,415,384.65
  5. Step 5: Solve for x
    x = 1,203,415,384.65/39,808.86
  6. Step 6: Final answer
    x = 30,229.84

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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.