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Finding the Fourth Proportional to 19,671.67, 27,118.32 and 13,612.67

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Solution

The fourth proportional to 19,671.67, 27,118.32 and 13,612.67 is: 18,765.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.67 : 27,118.32 = 13,612.67 : x
  2. Step 2: Convert to fraction form
    19,671.67/27,118.32 = 13,612.67/x
  3. Step 3: Cross multiply
    19,671.67x = 27,118.32 × 13,612.67
  4. Step 4: Simplify right side
    19,671.67x = 369,152,808.71
  5. Step 5: Solve for x
    x = 369,152,808.71/19,671.67
  6. Step 6: Final answer
    x = 18,765.71

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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.