Home / 18,420.32-25,406.52-11,700.20

Finding the Fourth Proportional to 18,420.32, 25,406.52 and 11,700.20

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Solution

The fourth proportional to 18,420.32, 25,406.52 and 11,700.20 is: 16,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.32 : 25,406.52 = 11,700.20 : x
  2. Step 2: Convert to fraction form
    18,420.32/25,406.52 = 11,700.20/x
  3. Step 3: Cross multiply
    18,420.32x = 25,406.52 × 11,700.20
  4. Step 4: Simplify right side
    18,420.32x = 297,261,365.30
  5. Step 5: Solve for x
    x = 297,261,365.30/18,420.32
  6. Step 6: Final answer
    x = 16,137.69

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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.