Home / 21,083.60-31,625.40-7,938.92

Finding the Fourth Proportional to 21,083.60, 31,625.40 and 7,938.92

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Solution

The fourth proportional to 21,083.60, 31,625.40 and 7,938.92 is: 11,908.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.60 : 31,625.40 = 7,938.92 : x
  2. Step 2: Convert to fraction form
    21,083.60/31,625.40 = 7,938.92/x
  3. Step 3: Cross multiply
    21,083.60x = 31,625.40 × 7,938.92
  4. Step 4: Simplify right side
    21,083.60x = 251,071,520.57
  5. Step 5: Solve for x
    x = 251,071,520.57/21,083.60
  6. Step 6: Final answer
    x = 11,908.38

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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.