Home / 39,744.16-54,847.20-21,840.64

Finding the Fourth Proportional to 39,744.16, 54,847.20 and 21,840.64

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Solution

The fourth proportional to 39,744.16, 54,847.20 and 21,840.64 is: 30,140.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,744.16 : 54,847.20 = 21,840.64 : x
  2. Step 2: Convert to fraction form
    39,744.16/54,847.20 = 21,840.64/x
  3. Step 3: Cross multiply
    39,744.16x = 54,847.20 × 21,840.64
  4. Step 4: Simplify right side
    39,744.16x = 1,197,897,950.21
  5. Step 5: Solve for x
    x = 1,197,897,950.21/39,744.16
  6. Step 6: Final answer
    x = 30,140.23

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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.