Home / 18,420.32-25,435.04-15,017.88

Finding the Fourth Proportional to 18,420.32, 25,435.04 and 15,017.88

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Solution

The fourth proportional to 18,420.32, 25,435.04 and 15,017.88 is: 20,736.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.32 : 25,435.04 = 15,017.88 : x
  2. Step 2: Convert to fraction form
    18,420.32/25,435.04 = 15,017.88/x
  3. Step 3: Cross multiply
    18,420.32x = 25,435.04 × 15,017.88
  4. Step 4: Simplify right side
    18,420.32x = 381,980,378.52
  5. Step 5: Solve for x
    x = 381,980,378.52/18,420.32
  6. Step 6: Final answer
    x = 20,736.90

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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.