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Finding the Fourth Proportional to 39,392.61, 54,361.98 and 21,487.56

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Solution

The fourth proportional to 39,392.61, 54,361.98 and 21,487.56 is: 29,652.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,392.61 : 54,361.98 = 21,487.56 : x
  2. Step 2: Convert to fraction form
    39,392.61/54,361.98 = 21,487.56/x
  3. Step 3: Cross multiply
    39,392.61x = 54,361.98 × 21,487.56
  4. Step 4: Simplify right side
    39,392.61x = 1,168,106,306.97
  5. Step 5: Solve for x
    x = 1,168,106,306.97/39,392.61
  6. Step 6: Final answer
    x = 29,652.93

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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.