Home / 21,210.48-31,817.28-5,628

Finding the Fourth Proportional to 21,210.48, 31,817.28 and 5,628

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Solution

The fourth proportional to 21,210.48, 31,817.28 and 5,628 is: 8,442.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.48 : 31,817.28 = 5,628 : x
  2. Step 2: Convert to fraction form
    21,210.48/31,817.28 = 5,628/x
  3. Step 3: Cross multiply
    21,210.48x = 31,817.28 × 5,628
  4. Step 4: Simplify right side
    21,210.48x = 179,067,651.84
  5. Step 5: Solve for x
    x = 179,067,651.84/21,210.48
  6. Step 6: Final answer
    x = 8,442.41

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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.