Home / 21,989.48-30,345.52-11,917.92

Finding the Fourth Proportional to 21,989.48, 30,345.52 and 11,917.92

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Solution

The fourth proportional to 21,989.48, 30,345.52 and 11,917.92 is: 16,446.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.48 : 30,345.52 = 11,917.92 : x
  2. Step 2: Convert to fraction form
    21,989.48/30,345.52 = 11,917.92/x
  3. Step 3: Cross multiply
    21,989.48x = 30,345.52 × 11,917.92
  4. Step 4: Simplify right side
    21,989.48x = 361,655,479.72
  5. Step 5: Solve for x
    x = 361,655,479.72/21,989.48
  6. Step 6: Final answer
    x = 16,446.75

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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.