Home / 18,519.04-27,779.08-8,128.40

Finding the Fourth Proportional to 18,519.04, 27,779.08 and 8,128.40

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Solution

The fourth proportional to 18,519.04, 27,779.08 and 8,128.40 is: 12,192.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519.04 : 27,779.08 = 8,128.40 : x
  2. Step 2: Convert to fraction form
    18,519.04/27,779.08 = 8,128.40/x
  3. Step 3: Cross multiply
    18,519.04x = 27,779.08 × 8,128.40
  4. Step 4: Simplify right side
    18,519.04x = 225,799,473.87
  5. Step 5: Solve for x
    x = 225,799,473.87/18,519.04
  6. Step 6: Final answer
    x = 12,192.83

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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.