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Finding the Fourth Proportional to 13,671.23, 20,431.93 and 9,981.23

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Solution

The fourth proportional to 13,671.23, 20,431.93 and 9,981.23 is: 14,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.23 : 20,431.93 = 9,981.23 : x
  2. Step 2: Convert to fraction form
    13,671.23/20,431.93 = 9,981.23/x
  3. Step 3: Cross multiply
    13,671.23x = 20,431.93 × 9,981.23
  4. Step 4: Simplify right side
    13,671.23x = 203,935,792.67
  5. Step 5: Solve for x
    x = 203,935,792.67/13,671.23
  6. Step 6: Final answer
    x = 14,917.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.