Home / 21,027.87-29,018.25-12,078.18

Finding the Fourth Proportional to 21,027.87, 29,018.25 and 12,078.18

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Solution

The fourth proportional to 21,027.87, 29,018.25 and 12,078.18 is: 16,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.87 : 29,018.25 = 12,078.18 : x
  2. Step 2: Convert to fraction form
    21,027.87/29,018.25 = 12,078.18/x
  3. Step 3: Cross multiply
    21,027.87x = 29,018.25 × 12,078.18
  4. Step 4: Simplify right side
    21,027.87x = 350,487,646.79
  5. Step 5: Solve for x
    x = 350,487,646.79/21,027.87
  6. Step 6: Final answer
    x = 16,667.77

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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.