Home / 13,568.50-18,725.61-7,980.58

Finding the Fourth Proportional to 13,568.50, 18,725.61 and 7,980.58

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Solution

The fourth proportional to 13,568.50, 18,725.61 and 7,980.58 is: 11,013.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,568.50 : 18,725.61 = 7,980.58 : x
  2. Step 2: Convert to fraction form
    13,568.50/18,725.61 = 7,980.58/x
  3. Step 3: Cross multiply
    13,568.50x = 18,725.61 × 7,980.58
  4. Step 4: Simplify right side
    13,568.50x = 149,441,228.65
  5. Step 5: Solve for x
    x = 149,441,228.65/13,568.50
  6. Step 6: Final answer
    x = 11,013.84

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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.