Home / 18,639.20-25,722.12-10,255.72

Finding the Fourth Proportional to 18,639.20, 25,722.12 and 10,255.72

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Solution

The fourth proportional to 18,639.20, 25,722.12 and 10,255.72 is: 14,152.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.20 : 25,722.12 = 10,255.72 : x
  2. Step 2: Convert to fraction form
    18,639.20/25,722.12 = 10,255.72/x
  3. Step 3: Cross multiply
    18,639.20x = 25,722.12 × 10,255.72
  4. Step 4: Simplify right side
    18,639.20x = 263,798,860.53
  5. Step 5: Solve for x
    x = 263,798,860.53/18,639.20
  6. Step 6: Final answer
    x = 14,152.91

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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.