Home / 12,287.12-18,430.53-8,665.79

Finding the Fourth Proportional to 12,287.12, 18,430.53 and 8,665.79

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Solution

The fourth proportional to 12,287.12, 18,430.53 and 8,665.79 is: 12,998.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.12 : 18,430.53 = 8,665.79 : x
  2. Step 2: Convert to fraction form
    12,287.12/18,430.53 = 8,665.79/x
  3. Step 3: Cross multiply
    12,287.12x = 18,430.53 × 8,665.79
  4. Step 4: Simplify right side
    12,287.12x = 159,715,010.42
  5. Step 5: Solve for x
    x = 159,715,010.42/12,287.12
  6. Step 6: Final answer
    x = 12,998.57

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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.