Home / 13,750.20-18,979.03-12,815.26

Finding the Fourth Proportional to 13,750.20, 18,979.03 and 12,815.26

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Solution

The fourth proportional to 13,750.20, 18,979.03 and 12,815.26 is: 17,688.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.20 : 18,979.03 = 12,815.26 : x
  2. Step 2: Convert to fraction form
    13,750.20/18,979.03 = 12,815.26/x
  3. Step 3: Cross multiply
    13,750.20x = 18,979.03 × 12,815.26
  4. Step 4: Simplify right side
    13,750.20x = 243,221,141.14
  5. Step 5: Solve for x
    x = 243,221,141.14/13,750.20
  6. Step 6: Final answer
    x = 17,688.56

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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.