Home / 21,283.12-31,939.26-7,432.12

Finding the Fourth Proportional to 21,283.12, 31,939.26 and 7,432.12

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Solution

The fourth proportional to 21,283.12, 31,939.26 and 7,432.12 is: 11,153.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.12 : 31,939.26 = 7,432.12 : x
  2. Step 2: Convert to fraction form
    21,283.12/31,939.26 = 7,432.12/x
  3. Step 3: Cross multiply
    21,283.12x = 31,939.26 × 7,432.12
  4. Step 4: Simplify right side
    21,283.12x = 237,376,413.03
  5. Step 5: Solve for x
    x = 237,376,413.03/21,283.12
  6. Step 6: Final answer
    x = 11,153.27

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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.