Home / 20,378.88-28,127.52-12,000.24

Finding the Fourth Proportional to 20,378.88, 28,127.52 and 12,000.24

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Solution

The fourth proportional to 20,378.88, 28,127.52 and 12,000.24 is: 16,563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.88 : 28,127.52 = 12,000.24 : x
  2. Step 2: Convert to fraction form
    20,378.88/28,127.52 = 12,000.24/x
  3. Step 3: Cross multiply
    20,378.88x = 28,127.52 × 12,000.24
  4. Step 4: Simplify right side
    20,378.88x = 337,536,990.60
  5. Step 5: Solve for x
    x = 337,536,990.60/20,378.88
  6. Step 6: Final answer
    x = 16,563.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.