Home / 11,685.80-17,518.30-4,288.55

Finding the Fourth Proportional to 11,685.80, 17,518.30 and 4,288.55

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Solution

The fourth proportional to 11,685.80, 17,518.30 and 4,288.55 is: 6,429.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,685.80 : 17,518.30 = 4,288.55 : x
  2. Step 2: Convert to fraction form
    11,685.80/17,518.30 = 4,288.55/x
  3. Step 3: Cross multiply
    11,685.80x = 17,518.30 × 4,288.55
  4. Step 4: Simplify right side
    11,685.80x = 75,128,007.15
  5. Step 5: Solve for x
    x = 75,128,007.15/11,685.80
  6. Step 6: Final answer
    x = 6,429.00

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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.