Home / 28,579.87-39,439.49-15,659.06

Finding the Fourth Proportional to 28,579.87, 39,439.49 and 15,659.06

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Solution

The fourth proportional to 28,579.87, 39,439.49 and 15,659.06 is: 21,609.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,579.87 : 39,439.49 = 15,659.06 : x
  2. Step 2: Convert to fraction form
    28,579.87/39,439.49 = 15,659.06/x
  3. Step 3: Cross multiply
    28,579.87x = 39,439.49 × 15,659.06
  4. Step 4: Simplify right side
    28,579.87x = 617,585,152.87
  5. Step 5: Solve for x
    x = 617,585,152.87/28,579.87
  6. Step 6: Final answer
    x = 21,609.09

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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.