Home / 30,109.86-45,165.53-10,119.65

Finding the Fourth Proportional to 30,109.86, 45,165.53 and 10,119.65

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Solution

The fourth proportional to 30,109.86, 45,165.53 and 10,119.65 is: 15,179.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,109.86 : 45,165.53 = 10,119.65 : x
  2. Step 2: Convert to fraction form
    30,109.86/45,165.53 = 10,119.65/x
  3. Step 3: Cross multiply
    30,109.86x = 45,165.53 × 10,119.65
  4. Step 4: Simplify right side
    30,109.86x = 457,059,409.19
  5. Step 5: Solve for x
    x = 457,059,409.19/30,109.86
  6. Step 6: Final answer
    x = 15,179.73

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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.