Home / 18,509.28-25,515.60-12,210.72

Finding the Fourth Proportional to 18,509.28, 25,515.60 and 12,210.72

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Solution

The fourth proportional to 18,509.28, 25,515.60 and 12,210.72 is: 16,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509.28 : 25,515.60 = 12,210.72 : x
  2. Step 2: Convert to fraction form
    18,509.28/25,515.60 = 12,210.72/x
  3. Step 3: Cross multiply
    18,509.28x = 25,515.60 × 12,210.72
  4. Step 4: Simplify right side
    18,509.28x = 311,563,847.23
  5. Step 5: Solve for x
    x = 311,563,847.23/18,509.28
  6. Step 6: Final answer
    x = 16,832.85

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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.