Home / 30,409.12-45,599.10-12,869.38

Finding the Fourth Proportional to 30,409.12, 45,599.10 and 12,869.38

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Solution

The fourth proportional to 30,409.12, 45,599.10 and 12,869.38 is: 19,297.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,409.12 : 45,599.10 = 12,869.38 : x
  2. Step 2: Convert to fraction form
    30,409.12/45,599.10 = 12,869.38/x
  3. Step 3: Cross multiply
    30,409.12x = 45,599.10 × 12,869.38
  4. Step 4: Simplify right side
    30,409.12x = 586,832,145.56
  5. Step 5: Solve for x
    x = 586,832,145.56/30,409.12
  6. Step 6: Final answer
    x = 19,297.90

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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.