Home / 20,725.80-31,079.70-9,628.80

Finding the Fourth Proportional to 20,725.80, 31,079.70 and 9,628.80

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Solution

The fourth proportional to 20,725.80, 31,079.70 and 9,628.80 is: 14,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.80 : 31,079.70 = 9,628.80 : x
  2. Step 2: Convert to fraction form
    20,725.80/31,079.70 = 9,628.80/x
  3. Step 3: Cross multiply
    20,725.80x = 31,079.70 × 9,628.80
  4. Step 4: Simplify right side
    20,725.80x = 299,260,215.36
  5. Step 5: Solve for x
    x = 299,260,215.36/20,725.80
  6. Step 6: Final answer
    x = 14,439.02

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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.