Home / 21,259.74-31,868.79-7,922.97

Finding the Fourth Proportional to 21,259.74, 31,868.79 and 7,922.97

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Solution

The fourth proportional to 21,259.74, 31,868.79 and 7,922.97 is: 11,876.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.74 : 31,868.79 = 7,922.97 : x
  2. Step 2: Convert to fraction form
    21,259.74/31,868.79 = 7,922.97/x
  3. Step 3: Cross multiply
    21,259.74x = 31,868.79 × 7,922.97
  4. Step 4: Simplify right side
    21,259.74x = 252,495,467.11
  5. Step 5: Solve for x
    x = 252,495,467.11/21,259.74
  6. Step 6: Final answer
    x = 11,876.70

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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.