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Finding the Fourth Proportional to 39,507.35, 54,519.35 and 21,602.16

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Solution

The fourth proportional to 39,507.35, 54,519.35 and 21,602.16 is: 29,810.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,507.35 : 54,519.35 = 21,602.16 : x
  2. Step 2: Convert to fraction form
    39,507.35/54,519.35 = 21,602.16/x
  3. Step 3: Cross multiply
    39,507.35x = 54,519.35 × 21,602.16
  4. Step 4: Simplify right side
    39,507.35x = 1,177,735,613.79
  5. Step 5: Solve for x
    x = 1,177,735,613.79/39,507.35
  6. Step 6: Final answer
    x = 29,810.55

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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.