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Finding the Fourth Proportional to 18,506.30, 25,515.54 and 15,444.56

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Solution

The fourth proportional to 18,506.30, 25,515.54 and 15,444.56 is: 21,294.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,506.30 : 25,515.54 = 15,444.56 : x
  2. Step 2: Convert to fraction form
    18,506.30/25,515.54 = 15,444.56/x
  3. Step 3: Cross multiply
    18,506.30x = 25,515.54 × 15,444.56
  4. Step 4: Simplify right side
    18,506.30x = 394,076,160.88
  5. Step 5: Solve for x
    x = 394,076,160.88/18,506.30
  6. Step 6: Final answer
    x = 21,294.17

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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.