Home / 18,780.80-25,875.77-12,396.02

Finding the Fourth Proportional to 18,780.80, 25,875.77 and 12,396.02

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Solution

The fourth proportional to 18,780.80, 25,875.77 and 12,396.02 is: 17,078.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.80 : 25,875.77 = 12,396.02 : x
  2. Step 2: Convert to fraction form
    18,780.80/25,875.77 = 12,396.02/x
  3. Step 3: Cross multiply
    18,780.80x = 25,875.77 × 12,396.02
  4. Step 4: Simplify right side
    18,780.80x = 320,756,371.08
  5. Step 5: Solve for x
    x = 320,756,371.08/18,780.80
  6. Step 6: Final answer
    x = 17,078.96

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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.