Home / 30,390.12-45,579.38-12,872.26

Finding the Fourth Proportional to 30,390.12, 45,579.38 and 12,872.26

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Solution

The fourth proportional to 30,390.12, 45,579.38 and 12,872.26 is: 19,305.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.12 : 45,579.38 = 12,872.26 : x
  2. Step 2: Convert to fraction form
    30,390.12/45,579.38 = 12,872.26/x
  3. Step 3: Cross multiply
    30,390.12x = 45,579.38 × 12,872.26
  4. Step 4: Simplify right side
    30,390.12x = 586,709,630.00
  5. Step 5: Solve for x
    x = 586,709,630.00/30,390.12
  6. Step 6: Final answer
    x = 19,305.93

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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.