Home / 20,970.94-28,939.98-12,018.64

Finding the Fourth Proportional to 20,970.94, 28,939.98 and 12,018.64

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Solution

The fourth proportional to 20,970.94, 28,939.98 and 12,018.64 is: 16,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.94 : 28,939.98 = 12,018.64 : x
  2. Step 2: Convert to fraction form
    20,970.94/28,939.98 = 12,018.64/x
  3. Step 3: Cross multiply
    20,970.94x = 28,939.98 × 12,018.64
  4. Step 4: Simplify right side
    20,970.94x = 347,819,201.23
  5. Step 5: Solve for x
    x = 347,819,201.23/20,970.94
  6. Step 6: Final answer
    x = 16,585.77

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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.