Home / 12,187.12-18,277.80-5,609.20

Finding the Fourth Proportional to 12,187.12, 18,277.80 and 5,609.20

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Solution

The fourth proportional to 12,187.12, 18,277.80 and 5,609.20 is: 8,412.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.12 : 18,277.80 = 5,609.20 : x
  2. Step 2: Convert to fraction form
    12,187.12/18,277.80 = 5,609.20/x
  3. Step 3: Cross multiply
    12,187.12x = 18,277.80 × 5,609.20
  4. Step 4: Simplify right side
    12,187.12x = 102,523,835.76
  5. Step 5: Solve for x
    x = 102,523,835.76/12,187.12
  6. Step 6: Final answer
    x = 8,412.47

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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.