Home / 30,115.78-45,165.14-19,005.82

Finding the Fourth Proportional to 30,115.78, 45,165.14 and 19,005.82

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Solution

The fourth proportional to 30,115.78, 45,165.14 and 19,005.82 is: 28,503.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,115.78 : 45,165.14 = 19,005.82 : x
  2. Step 2: Convert to fraction form
    30,115.78/45,165.14 = 19,005.82/x
  3. Step 3: Cross multiply
    30,115.78x = 45,165.14 × 19,005.82
  4. Step 4: Simplify right side
    30,115.78x = 858,400,521.11
  5. Step 5: Solve for x
    x = 858,400,521.11/30,115.78
  6. Step 6: Final answer
    x = 28,503.35

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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.