Home / 30,109.38-45,165.72-12,561.54

Finding the Fourth Proportional to 30,109.38, 45,165.72 and 12,561.54

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Solution

The fourth proportional to 30,109.38, 45,165.72 and 12,561.54 is: 18,843.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,109.38 : 45,165.72 = 12,561.54 : x
  2. Step 2: Convert to fraction form
    30,109.38/45,165.72 = 12,561.54/x
  3. Step 3: Cross multiply
    30,109.38x = 45,165.72 × 12,561.54
  4. Step 4: Simplify right side
    30,109.38x = 567,350,998.41
  5. Step 5: Solve for x
    x = 567,350,998.41/30,109.38
  6. Step 6: Final answer
    x = 18,843.00

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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.