Home / 30,320.66-45,487.29-12,790.64

Finding the Fourth Proportional to 30,320.66, 45,487.29 and 12,790.64

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Solution

The fourth proportional to 30,320.66, 45,487.29 and 12,790.64 is: 19,188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,320.66 : 45,487.29 = 12,790.64 : x
  2. Step 2: Convert to fraction form
    30,320.66/45,487.29 = 12,790.64/x
  3. Step 3: Cross multiply
    30,320.66x = 45,487.29 × 12,790.64
  4. Step 4: Simplify right side
    30,320.66x = 581,811,323.53
  5. Step 5: Solve for x
    x = 581,811,323.53/30,320.66
  6. Step 6: Final answer
    x = 19,188.61

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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.