Home / 21,579.14-29,778.86-12,018.77

Finding the Fourth Proportional to 21,579.14, 29,778.86 and 12,018.77

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Solution

The fourth proportional to 21,579.14, 29,778.86 and 12,018.77 is: 16,585.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.14 : 29,778.86 = 12,018.77 : x
  2. Step 2: Convert to fraction form
    21,579.14/29,778.86 = 12,018.77/x
  3. Step 3: Cross multiply
    21,579.14x = 29,778.86 × 12,018.77
  4. Step 4: Simplify right side
    21,579.14x = 357,905,060.21
  5. Step 5: Solve for x
    x = 357,905,060.21/21,579.14
  6. Step 6: Final answer
    x = 16,585.70

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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.