Home / 21,021.96-29,012.37-15,707.55

Finding the Fourth Proportional to 21,021.96, 29,012.37 and 15,707.55

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Solution

The fourth proportional to 21,021.96, 29,012.37 and 15,707.55 is: 21,677.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.96 : 29,012.37 = 15,707.55 : x
  2. Step 2: Convert to fraction form
    21,021.96/29,012.37 = 15,707.55/x
  3. Step 3: Cross multiply
    21,021.96x = 29,012.37 × 15,707.55
  4. Step 4: Simplify right side
    21,021.96x = 455,713,252.39
  5. Step 5: Solve for x
    x = 455,713,252.39/21,021.96
  6. Step 6: Final answer
    x = 21,677.96

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.