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Finding the Fourth Proportional to 38,306.40, 57,459.60 and 21,393.60

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Solution

The fourth proportional to 38,306.40, 57,459.60 and 21,393.60 is: 32,090.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,306.40 : 57,459.60 = 21,393.60 : x
  2. Step 2: Convert to fraction form
    38,306.40/57,459.60 = 21,393.60/x
  3. Step 3: Cross multiply
    38,306.40x = 57,459.60 × 21,393.60
  4. Step 4: Simplify right side
    38,306.40x = 1,229,267,698.56
  5. Step 5: Solve for x
    x = 1,229,267,698.56/38,306.40
  6. Step 6: Final answer
    x = 32,090.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.