Home / 12,109.55-18,166.75-4,318.16

Finding the Fourth Proportional to 12,109.55, 18,166.75 and 4,318.16

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Solution

The fourth proportional to 12,109.55, 18,166.75 and 4,318.16 is: 6,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.55 : 18,166.75 = 4,318.16 : x
  2. Step 2: Convert to fraction form
    12,109.55/18,166.75 = 4,318.16/x
  3. Step 3: Cross multiply
    12,109.55x = 18,166.75 × 4,318.16
  4. Step 4: Simplify right side
    12,109.55x = 78,446,831.55
  5. Step 5: Solve for x
    x = 78,446,831.55/12,109.55
  6. Step 6: Final answer
    x = 6,478.10

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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.