Home / 21,262.95-31,886.19-7,220.61

Finding the Fourth Proportional to 21,262.95, 31,886.19 and 7,220.61

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Solution

The fourth proportional to 21,262.95, 31,886.19 and 7,220.61 is: 10,828.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,262.95 : 31,886.19 = 7,220.61 : x
  2. Step 2: Convert to fraction form
    21,262.95/31,886.19 = 7,220.61/x
  3. Step 3: Cross multiply
    21,262.95x = 31,886.19 × 7,220.61
  4. Step 4: Simplify right side
    21,262.95x = 230,237,742.38
  5. Step 5: Solve for x
    x = 230,237,742.38/21,262.95
  6. Step 6: Final answer
    x = 10,828.12

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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.