Home / 20,267.10-30,400.65-12,480.30

Finding the Fourth Proportional to 20,267.10, 30,400.65 and 12,480.30

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Solution

The fourth proportional to 20,267.10, 30,400.65 and 12,480.30 is: 18,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.10 : 30,400.65 = 12,480.30 : x
  2. Step 2: Convert to fraction form
    20,267.10/30,400.65 = 12,480.30/x
  3. Step 3: Cross multiply
    20,267.10x = 30,400.65 × 12,480.30
  4. Step 4: Simplify right side
    20,267.10x = 379,409,232.20
  5. Step 5: Solve for x
    x = 379,409,232.20/20,267.10
  6. Step 6: Final answer
    x = 18,720.45

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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.