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Finding the Fourth Proportional to 21,773.54, 30,048.09 and 15,411.50

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Solution

The fourth proportional to 21,773.54, 30,048.09 and 15,411.50 is: 21,268.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,773.54 : 30,048.09 = 15,411.50 : x
  2. Step 2: Convert to fraction form
    21,773.54/30,048.09 = 15,411.50/x
  3. Step 3: Cross multiply
    21,773.54x = 30,048.09 × 15,411.50
  4. Step 4: Simplify right side
    21,773.54x = 463,086,139.04
  5. Step 5: Solve for x
    x = 463,086,139.04/21,773.54
  6. Step 6: Final answer
    x = 21,268.30

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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.