Home / 42,830.38-64,260.78-19,135.75

Finding the Fourth Proportional to 42,830.38, 64,260.78 and 19,135.75

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Solution

The fourth proportional to 42,830.38, 64,260.78 and 19,135.75 is: 28,710.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,830.38 : 64,260.78 = 19,135.75 : x
  2. Step 2: Convert to fraction form
    42,830.38/64,260.78 = 19,135.75/x
  3. Step 3: Cross multiply
    42,830.38x = 64,260.78 × 19,135.75
  4. Step 4: Simplify right side
    42,830.38x = 1,229,678,108.96
  5. Step 5: Solve for x
    x = 1,229,678,108.96/42,830.38
  6. Step 6: Final answer
    x = 28,710.42

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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.