Home / 20,979.76-28,952.18-12,027.80

Finding the Fourth Proportional to 20,979.76, 28,952.18 and 12,027.80

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Solution

The fourth proportional to 20,979.76, 28,952.18 and 12,027.80 is: 16,598.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.76 : 28,952.18 = 12,027.80 : x
  2. Step 2: Convert to fraction form
    20,979.76/28,952.18 = 12,027.80/x
  3. Step 3: Cross multiply
    20,979.76x = 28,952.18 × 12,027.80
  4. Step 4: Simplify right side
    20,979.76x = 348,231,030.60
  5. Step 5: Solve for x
    x = 348,231,030.60/20,979.76
  6. Step 6: Final answer
    x = 16,598.43

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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.