Home / 30,656.72-45,988.32-13,121.84

Finding the Fourth Proportional to 30,656.72, 45,988.32 and 13,121.84

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Solution

The fourth proportional to 30,656.72, 45,988.32 and 13,121.84 is: 19,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,656.72 : 45,988.32 = 13,121.84 : x
  2. Step 2: Convert to fraction form
    30,656.72/45,988.32 = 13,121.84/x
  3. Step 3: Cross multiply
    30,656.72x = 45,988.32 × 13,121.84
  4. Step 4: Simplify right side
    30,656.72x = 603,451,376.91
  5. Step 5: Solve for x
    x = 603,451,376.91/30,656.72
  6. Step 6: Final answer
    x = 19,684.15

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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.