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Finding the Fourth Proportional to 38,762.40, 58,066.80 and 21,200.80

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Solution

The fourth proportional to 38,762.40, 58,066.80 and 21,200.80 is: 31,759.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,762.40 : 58,066.80 = 21,200.80 : x
  2. Step 2: Convert to fraction form
    38,762.40/58,066.80 = 21,200.80/x
  3. Step 3: Cross multiply
    38,762.40x = 58,066.80 × 21,200.80
  4. Step 4: Simplify right side
    38,762.40x = 1,231,062,613.44
  5. Step 5: Solve for x
    x = 1,231,062,613.44/38,762.40
  6. Step 6: Final answer
    x = 31,759.19

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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.