Home / 13,515.86-18,651.16-8,478.47

Finding the Fourth Proportional to 13,515.86, 18,651.16 and 8,478.47

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Solution

The fourth proportional to 13,515.86, 18,651.16 and 8,478.47 is: 11,699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.86 : 18,651.16 = 8,478.47 : x
  2. Step 2: Convert to fraction form
    13,515.86/18,651.16 = 8,478.47/x
  3. Step 3: Cross multiply
    13,515.86x = 18,651.16 × 8,478.47
  4. Step 4: Simplify right side
    13,515.86x = 158,133,357.75
  5. Step 5: Solve for x
    x = 158,133,357.75/13,515.86
  6. Step 6: Final answer
    x = 11,699.83

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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.