Home / 13,458.87-18,569.79-8,151.75

Finding the Fourth Proportional to 13,458.87, 18,569.79 and 8,151.75

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Solution

The fourth proportional to 13,458.87, 18,569.79 and 8,151.75 is: 11,247.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.87 : 18,569.79 = 8,151.75 : x
  2. Step 2: Convert to fraction form
    13,458.87/18,569.79 = 8,151.75/x
  3. Step 3: Cross multiply
    13,458.87x = 18,569.79 × 8,151.75
  4. Step 4: Simplify right side
    13,458.87x = 151,376,285.63
  5. Step 5: Solve for x
    x = 151,376,285.63/13,458.87
  6. Step 6: Final answer
    x = 11,247.33

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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.