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Finding the Fourth Proportional to 20,658, 28,583.10 and 18,010.92

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Solution

The fourth proportional to 20,658, 28,583.10 and 18,010.92 is: 24,920.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658 : 28,583.10 = 18,010.92 : x
  2. Step 2: Convert to fraction form
    20,658/28,583.10 = 18,010.92/x
  3. Step 3: Cross multiply
    20,658x = 28,583.10 × 18,010.92
  4. Step 4: Simplify right side
    20,658x = 514,807,927.45
  5. Step 5: Solve for x
    x = 514,807,927.45/20,658
  6. Step 6: Final answer
    x = 24,920.51

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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.