Home / 21,285.52-31,917.65-12,403.94

Finding the Fourth Proportional to 21,285.52, 31,917.65 and 12,403.94

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Solution

The fourth proportional to 21,285.52, 31,917.65 and 12,403.94 is: 18,599.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.52 : 31,917.65 = 12,403.94 : x
  2. Step 2: Convert to fraction form
    21,285.52/31,917.65 = 12,403.94/x
  3. Step 3: Cross multiply
    21,285.52x = 31,917.65 × 12,403.94
  4. Step 4: Simplify right side
    21,285.52x = 395,904,393.93
  5. Step 5: Solve for x
    x = 395,904,393.93/21,285.52
  6. Step 6: Final answer
    x = 18,599.71

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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.