Home / 21,307.32-31,961.25-8,160.48

Finding the Fourth Proportional to 21,307.32, 31,961.25 and 8,160.48

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Solution

The fourth proportional to 21,307.32, 31,961.25 and 8,160.48 is: 12,240.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.32 : 31,961.25 = 8,160.48 : x
  2. Step 2: Convert to fraction form
    21,307.32/31,961.25 = 8,160.48/x
  3. Step 3: Cross multiply
    21,307.32x = 31,961.25 × 8,160.48
  4. Step 4: Simplify right side
    21,307.32x = 260,819,141.40
  5. Step 5: Solve for x
    x = 260,819,141.40/21,307.32
  6. Step 6: Final answer
    x = 12,240.82

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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.