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Finding the Fourth Proportional to 18,281.70, 27,422.55 and 12,376.80

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Solution

The fourth proportional to 18,281.70, 27,422.55 and 12,376.80 is: 18,565.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.70 : 27,422.55 = 12,376.80 : x
  2. Step 2: Convert to fraction form
    18,281.70/27,422.55 = 12,376.80/x
  3. Step 3: Cross multiply
    18,281.70x = 27,422.55 × 12,376.80
  4. Step 4: Simplify right side
    18,281.70x = 339,403,416.84
  5. Step 5: Solve for x
    x = 339,403,416.84/18,281.70
  6. Step 6: Final answer
    x = 18,565.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.