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Finding the Fourth Proportional to 39,700.32, 54,784.88 and 21,796.32

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Solution

The fourth proportional to 39,700.32, 54,784.88 and 21,796.32 is: 30,078.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,700.32 : 54,784.88 = 21,796.32 : x
  2. Step 2: Convert to fraction form
    39,700.32/54,784.88 = 21,796.32/x
  3. Step 3: Cross multiply
    39,700.32x = 54,784.88 × 21,796.32
  4. Step 4: Simplify right side
    39,700.32x = 1,194,108,775.64
  5. Step 5: Solve for x
    x = 1,194,108,775.64/39,700.32
  6. Step 6: Final answer
    x = 30,078.06

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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.