Home / 21,001.41-28,981.98-11,569.98

Finding the Fourth Proportional to 21,001.41, 28,981.98 and 11,569.98

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Solution

The fourth proportional to 21,001.41, 28,981.98 and 11,569.98 is: 15,966.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.41 : 28,981.98 = 11,569.98 : x
  2. Step 2: Convert to fraction form
    21,001.41/28,981.98 = 11,569.98/x
  3. Step 3: Cross multiply
    21,001.41x = 28,981.98 × 11,569.98
  4. Step 4: Simplify right side
    21,001.41x = 335,320,928.96
  5. Step 5: Solve for x
    x = 335,320,928.96/21,001.41
  6. Step 6: Final answer
    x = 15,966.59

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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.