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Finding the Fourth Proportional to 21,998.79, 30,350.84 and 12,564.99

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Solution

The fourth proportional to 21,998.79, 30,350.84 and 12,564.99 is: 17,335.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.79 : 30,350.84 = 12,564.99 : x
  2. Step 2: Convert to fraction form
    21,998.79/30,350.84 = 12,564.99/x
  3. Step 3: Cross multiply
    21,998.79x = 30,350.84 × 12,564.99
  4. Step 4: Simplify right side
    21,998.79x = 381,357,938.27
  5. Step 5: Solve for x
    x = 381,357,938.27/21,998.79
  6. Step 6: Final answer
    x = 17,335.41

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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.