Home / 18,979.87-26,203.15-12,615.09

Finding the Fourth Proportional to 18,979.87, 26,203.15 and 12,615.09

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Solution

The fourth proportional to 18,979.87, 26,203.15 and 12,615.09 is: 17,416.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.87 : 26,203.15 = 12,615.09 : x
  2. Step 2: Convert to fraction form
    18,979.87/26,203.15 = 12,615.09/x
  3. Step 3: Cross multiply
    18,979.87x = 26,203.15 × 12,615.09
  4. Step 4: Simplify right side
    18,979.87x = 330,555,095.53
  5. Step 5: Solve for x
    x = 330,555,095.53/18,979.87
  6. Step 6: Final answer
    x = 17,416.09

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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.