Home / 18,931.08-28,396.72-7,831.75

Finding the Fourth Proportional to 18,931.08, 28,396.72 and 7,831.75

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Solution

The fourth proportional to 18,931.08, 28,396.72 and 7,831.75 is: 11,747.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.08 : 28,396.72 = 7,831.75 : x
  2. Step 2: Convert to fraction form
    18,931.08/28,396.72 = 7,831.75/x
  3. Step 3: Cross multiply
    18,931.08x = 28,396.72 × 7,831.75
  4. Step 4: Simplify right side
    18,931.08x = 222,396,011.86
  5. Step 5: Solve for x
    x = 222,396,011.86/18,931.08
  6. Step 6: Final answer
    x = 11,747.67

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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.