Home / 13,785.32-20,680.84-7,209.72

Finding the Fourth Proportional to 13,785.32, 20,680.84 and 7,209.72

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Solution

The fourth proportional to 13,785.32, 20,680.84 and 7,209.72 is: 10,816.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.32 : 20,680.84 = 7,209.72 : x
  2. Step 2: Convert to fraction form
    13,785.32/20,680.84 = 7,209.72/x
  3. Step 3: Cross multiply
    13,785.32x = 20,680.84 × 7,209.72
  4. Step 4: Simplify right side
    13,785.32x = 149,103,065.76
  5. Step 5: Solve for x
    x = 149,103,065.76/13,785.32
  6. Step 6: Final answer
    x = 10,816.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.