Home / 15,120.32-20,785.32-13,510.08

Finding the Fourth Proportional to 15,120.32, 20,785.32 and 13,510.08

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Solution

The fourth proportional to 15,120.32, 20,785.32 and 13,510.08 is: 18,571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.32 : 20,785.32 = 13,510.08 : x
  2. Step 2: Convert to fraction form
    15,120.32/20,785.32 = 13,510.08/x
  3. Step 3: Cross multiply
    15,120.32x = 20,785.32 × 13,510.08
  4. Step 4: Simplify right side
    15,120.32x = 280,811,336.03
  5. Step 5: Solve for x
    x = 280,811,336.03/15,120.32
  6. Step 6: Final answer
    x = 18,571.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.