Home / 15,831.12-21,847.08-8,660.88

Finding the Fourth Proportional to 15,831.12, 21,847.08 and 8,660.88

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Solution

The fourth proportional to 15,831.12, 21,847.08 and 8,660.88 is: 11,952.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.12 : 21,847.08 = 8,660.88 : x
  2. Step 2: Convert to fraction form
    15,831.12/21,847.08 = 8,660.88/x
  3. Step 3: Cross multiply
    15,831.12x = 21,847.08 × 8,660.88
  4. Step 4: Simplify right side
    15,831.12x = 189,214,938.23
  5. Step 5: Solve for x
    x = 189,214,938.23/15,831.12
  6. Step 6: Final answer
    x = 11,952.09

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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.