Home / 39,380.60-54,345.26-21,475.64

Finding the Fourth Proportional to 39,380.60, 54,345.26 and 21,475.64

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Solution

The fourth proportional to 39,380.60, 54,345.26 and 21,475.64 is: 29,636.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,380.60 : 54,345.26 = 21,475.64 : x
  2. Step 2: Convert to fraction form
    39,380.60/54,345.26 = 21,475.64/x
  3. Step 3: Cross multiply
    39,380.60x = 54,345.26 × 21,475.64
  4. Step 4: Simplify right side
    39,380.60x = 1,167,099,239.47
  5. Step 5: Solve for x
    x = 1,167,099,239.47/39,380.60
  6. Step 6: Final answer
    x = 29,636.40

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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.