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Finding the Fourth Proportional to 21,063.57, 31,552.97 and 9,980.95

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Solution

The fourth proportional to 21,063.57, 31,552.97 and 9,980.95 is: 14,951.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.57 : 31,552.97 = 9,980.95 : x
  2. Step 2: Convert to fraction form
    21,063.57/31,552.97 = 9,980.95/x
  3. Step 3: Cross multiply
    21,063.57x = 31,552.97 × 9,980.95
  4. Step 4: Simplify right side
    21,063.57x = 314,928,408.25
  5. Step 5: Solve for x
    x = 314,928,408.25/21,063.57
  6. Step 6: Final answer
    x = 14,951.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.