Home / 21,579.12-29,778.73-12,018.98

Finding the Fourth Proportional to 21,579.12, 29,778.73 and 12,018.98

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Solution

The fourth proportional to 21,579.12, 29,778.73 and 12,018.98 is: 16,585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.12 : 29,778.73 = 12,018.98 : x
  2. Step 2: Convert to fraction form
    21,579.12/29,778.73 = 12,018.98/x
  3. Step 3: Cross multiply
    21,579.12x = 29,778.73 × 12,018.98
  4. Step 4: Simplify right side
    21,579.12x = 357,909,967.09
  5. Step 5: Solve for x
    x = 357,909,967.09/21,579.12
  6. Step 6: Final answer
    x = 16,585.94

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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.