Home / 20,125.10-30,187.65-18,812.90

Finding the Fourth Proportional to 20,125.10, 30,187.65 and 18,812.90

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Solution

The fourth proportional to 20,125.10, 30,187.65 and 18,812.90 is: 28,219.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.10 : 30,187.65 = 18,812.90 : x
  2. Step 2: Convert to fraction form
    20,125.10/30,187.65 = 18,812.90/x
  3. Step 3: Cross multiply
    20,125.10x = 30,187.65 × 18,812.90
  4. Step 4: Simplify right side
    20,125.10x = 567,917,240.69
  5. Step 5: Solve for x
    x = 567,917,240.69/20,125.10
  6. Step 6: Final answer
    x = 28,219.35

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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.