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Finding the Fourth Proportional to 39,160.42, 54,041.42 and 21,255.42

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Solution

The fourth proportional to 39,160.42, 54,041.42 and 21,255.42 is: 29,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,160.42 : 54,041.42 = 21,255.42 : x
  2. Step 2: Convert to fraction form
    39,160.42/54,041.42 = 21,255.42/x
  3. Step 3: Cross multiply
    39,160.42x = 54,041.42 × 21,255.42
  4. Step 4: Simplify right side
    39,160.42x = 1,148,673,132.63
  5. Step 5: Solve for x
    x = 1,148,673,132.63/39,160.42
  6. Step 6: Final answer
    x = 29,332.50

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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.