Home / 42,764.36-64,102.80-21,665.30

Finding the Fourth Proportional to 42,764.36, 64,102.80 and 21,665.30

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Solution

The fourth proportional to 42,764.36, 64,102.80 and 21,665.30 is: 32,475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,764.36 : 64,102.80 = 21,665.30 : x
  2. Step 2: Convert to fraction form
    42,764.36/64,102.80 = 21,665.30/x
  3. Step 3: Cross multiply
    42,764.36x = 64,102.80 × 21,665.30
  4. Step 4: Simplify right side
    42,764.36x = 1,388,806,392.84
  5. Step 5: Solve for x
    x = 1,388,806,392.84/42,764.36
  6. Step 6: Final answer
    x = 32,475.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.