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Finding the Fourth Proportional to 21,510.93, 29,684.10 and 11,951.49

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Solution

The fourth proportional to 21,510.93, 29,684.10 and 11,951.49 is: 16,492.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.93 : 29,684.10 = 11,951.49 : x
  2. Step 2: Convert to fraction form
    21,510.93/29,684.10 = 11,951.49/x
  3. Step 3: Cross multiply
    21,510.93x = 29,684.10 × 11,951.49
  4. Step 4: Simplify right side
    21,510.93x = 354,769,224.31
  5. Step 5: Solve for x
    x = 354,769,224.31/21,510.93
  6. Step 6: Final answer
    x = 16,492.51

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1.5x scale

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.