Home / 12,210.12-18,315.72-3,445.68

Finding the Fourth Proportional to 12,210.12, 18,315.72 and 3,445.68

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Solution

The fourth proportional to 12,210.12, 18,315.72 and 3,445.68 is: 5,168.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.12 : 18,315.72 = 3,445.68 : x
  2. Step 2: Convert to fraction form
    12,210.12/18,315.72 = 3,445.68/x
  3. Step 3: Cross multiply
    12,210.12x = 18,315.72 × 3,445.68
  4. Step 4: Simplify right side
    12,210.12x = 63,110,110.09
  5. Step 5: Solve for x
    x = 63,110,110.09/12,210.12
  6. Step 6: Final answer
    x = 5,168.67

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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.