Home / 12,138.32-18,199.95-5,114.72

Finding the Fourth Proportional to 12,138.32, 18,199.95 and 5,114.72

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Solution

The fourth proportional to 12,138.32, 18,199.95 and 5,114.72 is: 7,668.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.32 : 18,199.95 = 5,114.72 : x
  2. Step 2: Convert to fraction form
    12,138.32/18,199.95 = 5,114.72/x
  3. Step 3: Cross multiply
    12,138.32x = 18,199.95 × 5,114.72
  4. Step 4: Simplify right side
    12,138.32x = 93,087,674.58
  5. Step 5: Solve for x
    x = 93,087,674.58/12,138.32
  6. Step 6: Final answer
    x = 7,668.91

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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.