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Finding the Fourth Proportional to 15,812.79, 21,821.01 and 9,093.84

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Solution

The fourth proportional to 15,812.79, 21,821.01 and 9,093.84 is: 12,549.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.79 : 21,821.01 = 9,093.84 : x
  2. Step 2: Convert to fraction form
    15,812.79/21,821.01 = 9,093.84/x
  3. Step 3: Cross multiply
    15,812.79x = 21,821.01 × 9,093.84
  4. Step 4: Simplify right side
    15,812.79x = 198,436,773.58
  5. Step 5: Solve for x
    x = 198,436,773.58/15,812.79
  6. Step 6: Final answer
    x = 12,549.13

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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.