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Finding the Fourth Proportional to 35,495.30, 48,979.96 and 20,957.21

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Solution

The fourth proportional to 35,495.30, 48,979.96 and 20,957.21 is: 28,918.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,495.30 : 48,979.96 = 20,957.21 : x
  2. Step 2: Convert to fraction form
    35,495.30/48,979.96 = 20,957.21/x
  3. Step 3: Cross multiply
    35,495.30x = 48,979.96 × 20,957.21
  4. Step 4: Simplify right side
    35,495.30x = 1,026,483,469.41
  5. Step 5: Solve for x
    x = 1,026,483,469.41/35,495.30
  6. Step 6: Final answer
    x = 28,918.86

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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.