Home / 20,989.41-28,965.40-11,557.97

Finding the Fourth Proportional to 20,989.41, 28,965.40 and 11,557.97

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Solution

The fourth proportional to 20,989.41, 28,965.40 and 11,557.97 is: 15,950.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.41 : 28,965.40 = 11,557.97 : x
  2. Step 2: Convert to fraction form
    20,989.41/28,965.40 = 11,557.97/x
  3. Step 3: Cross multiply
    20,989.41x = 28,965.40 × 11,557.97
  4. Step 4: Simplify right side
    20,989.41x = 334,781,159.14
  5. Step 5: Solve for x
    x = 334,781,159.14/20,989.41
  6. Step 6: Final answer
    x = 15,950.01

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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.