Home / 42,681.36-64,021.20-19,291.44

Finding the Fourth Proportional to 42,681.36, 64,021.20 and 19,291.44

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Solution

The fourth proportional to 42,681.36, 64,021.20 and 19,291.44 is: 28,936.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,681.36 : 64,021.20 = 19,291.44 : x
  2. Step 2: Convert to fraction form
    42,681.36/64,021.20 = 19,291.44/x
  3. Step 3: Cross multiply
    42,681.36x = 64,021.20 × 19,291.44
  4. Step 4: Simplify right side
    42,681.36x = 1,235,061,138.53
  5. Step 5: Solve for x
    x = 1,235,061,138.53/42,681.36
  6. Step 6: Final answer
    x = 28,936.78

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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.