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Finding the Fourth Proportional to 35,141.91, 48,491.05 and 20,991.75

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Solution

The fourth proportional to 35,141.91, 48,491.05 and 20,991.75 is: 28,965.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,141.91 : 48,491.05 = 20,991.75 : x
  2. Step 2: Convert to fraction form
    35,141.91/48,491.05 = 20,991.75/x
  3. Step 3: Cross multiply
    35,141.91x = 48,491.05 × 20,991.75
  4. Step 4: Simplify right side
    35,141.91x = 1,017,911,998.84
  5. Step 5: Solve for x
    x = 1,017,911,998.84/35,141.91
  6. Step 6: Final answer
    x = 28,965.76

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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.