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Finding the Fourth Proportional to 18,851.58, 28,061.87 and 18,571.32

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Solution

The fourth proportional to 18,851.58, 28,061.87 and 18,571.32 is: 27,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.58 : 28,061.87 = 18,571.32 : x
  2. Step 2: Convert to fraction form
    18,851.58/28,061.87 = 18,571.32/x
  3. Step 3: Cross multiply
    18,851.58x = 28,061.87 × 18,571.32
  4. Step 4: Simplify right side
    18,851.58x = 521,145,874.71
  5. Step 5: Solve for x
    x = 521,145,874.71/18,851.58
  6. Step 6: Final answer
    x = 27,644.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.