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Finding the Fourth Proportional to 39,104.80, 53,964.90 and 21,200.10

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Solution

The fourth proportional to 39,104.80, 53,964.90 and 21,200.10 is: 29,256.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,104.80 : 53,964.90 = 21,200.10 : x
  2. Step 2: Convert to fraction form
    39,104.80/53,964.90 = 21,200.10/x
  3. Step 3: Cross multiply
    39,104.80x = 53,964.90 × 21,200.10
  4. Step 4: Simplify right side
    39,104.80x = 1,144,061,276.49
  5. Step 5: Solve for x
    x = 1,144,061,276.49/39,104.80
  6. Step 6: Final answer
    x = 29,256.29

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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.