Home / 21,242.97-31,827.60-12,905.46

Finding the Fourth Proportional to 21,242.97, 31,827.60 and 12,905.46

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Solution

The fourth proportional to 21,242.97, 31,827.60 and 12,905.46 is: 19,335.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,242.97 : 31,827.60 = 12,905.46 : x
  2. Step 2: Convert to fraction form
    21,242.97/31,827.60 = 12,905.46/x
  3. Step 3: Cross multiply
    21,242.97x = 31,827.60 × 12,905.46
  4. Step 4: Simplify right side
    21,242.97x = 410,749,818.70
  5. Step 5: Solve for x
    x = 410,749,818.70/21,242.97
  6. Step 6: Final answer
    x = 19,335.80

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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.