Home / 30,212.05-45,322.68-15,412.90

Finding the Fourth Proportional to 30,212.05, 45,322.68 and 15,412.90

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Solution

The fourth proportional to 30,212.05, 45,322.68 and 15,412.90 is: 23,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,212.05 : 45,322.68 = 15,412.90 : x
  2. Step 2: Convert to fraction form
    30,212.05/45,322.68 = 15,412.90/x
  3. Step 3: Cross multiply
    30,212.05x = 45,322.68 × 15,412.90
  4. Step 4: Simplify right side
    30,212.05x = 698,553,707.96
  5. Step 5: Solve for x
    x = 698,553,707.96/30,212.05
  6. Step 6: Final answer
    x = 23,121.69

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1.5x scale

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.