Home / 18,518.40-27,786.69-8,656.23

Finding the Fourth Proportional to 18,518.40, 27,786.69 and 8,656.23

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Solution

The fourth proportional to 18,518.40, 27,786.69 and 8,656.23 is: 12,988.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.40 : 27,786.69 = 8,656.23 : x
  2. Step 2: Convert to fraction form
    18,518.40/27,786.69 = 8,656.23/x
  3. Step 3: Cross multiply
    18,518.40x = 27,786.69 × 8,656.23
  4. Step 4: Simplify right side
    18,518.40x = 240,527,979.58
  5. Step 5: Solve for x
    x = 240,527,979.58/18,518.40
  6. Step 6: Final answer
    x = 12,988.59

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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.