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Finding the Fourth Proportional to 35,355.28, 48,789.48 and 21,012.88

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Solution

The fourth proportional to 35,355.28, 48,789.48 and 21,012.88 is: 28,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,355.28 : 48,789.48 = 21,012.88 : x
  2. Step 2: Convert to fraction form
    35,355.28/48,789.48 = 21,012.88/x
  3. Step 3: Cross multiply
    35,355.28x = 48,789.48 × 21,012.88
  4. Step 4: Simplify right side
    35,355.28x = 1,025,207,488.50
  5. Step 5: Solve for x
    x = 1,025,207,488.50/35,355.28
  6. Step 6: Final answer
    x = 28,997.30

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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.