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Finding the Fourth Proportional to 35,136.72, 48,489.84 and 20,987.64

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Solution

The fourth proportional to 35,136.72, 48,489.84 and 20,987.64 is: 28,963.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,136.72 : 48,489.84 = 20,987.64 : x
  2. Step 2: Convert to fraction form
    35,136.72/48,489.84 = 20,987.64/x
  3. Step 3: Cross multiply
    35,136.72x = 48,489.84 × 20,987.64
  4. Step 4: Simplify right side
    35,136.72x = 1,017,687,305.58
  5. Step 5: Solve for x
    x = 1,017,687,305.58/35,136.72
  6. Step 6: Final answer
    x = 28,963.64

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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.