Home / 21,405.28-29,346.92-21,010.72

Finding the Fourth Proportional to 21,405.28, 29,346.92 and 21,010.72

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Solution

The fourth proportional to 21,405.28, 29,346.92 and 21,010.72 is: 28,805.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.28 : 29,346.92 = 21,010.72 : x
  2. Step 2: Convert to fraction form
    21,405.28/29,346.92 = 21,010.72/x
  3. Step 3: Cross multiply
    21,405.28x = 29,346.92 × 21,010.72
  4. Step 4: Simplify right side
    21,405.28x = 616,599,918.98
  5. Step 5: Solve for x
    x = 616,599,918.98/21,405.28
  6. Step 6: Final answer
    x = 28,805.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.