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Finding the Fourth Proportional to 35,679.75, 49,239.68 and 19,764.20

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Solution

The fourth proportional to 35,679.75, 49,239.68 and 19,764.20 is: 27,275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,679.75 : 49,239.68 = 19,764.20 : x
  2. Step 2: Convert to fraction form
    35,679.75/49,239.68 = 19,764.20/x
  3. Step 3: Cross multiply
    35,679.75x = 49,239.68 × 19,764.20
  4. Step 4: Simplify right side
    35,679.75x = 973,182,538.44
  5. Step 5: Solve for x
    x = 973,182,538.44/35,679.75
  6. Step 6: Final answer
    x = 27,275.49

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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.