Home / 30,069.18-45,109.31-12,540.51

Finding the Fourth Proportional to 30,069.18, 45,109.31 and 12,540.51

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Solution

The fourth proportional to 30,069.18, 45,109.31 and 12,540.51 is: 18,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,069.18 : 45,109.31 = 12,540.51 : x
  2. Step 2: Convert to fraction form
    30,069.18/45,109.31 = 12,540.51/x
  3. Step 3: Cross multiply
    30,069.18x = 45,109.31 × 12,540.51
  4. Step 4: Simplify right side
    30,069.18x = 565,693,690.45
  5. Step 5: Solve for x
    x = 565,693,690.45/30,069.18
  6. Step 6: Final answer
    x = 18,813.07

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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.