Home / 11,979.80-16,529.28-9,002.78

Finding the Fourth Proportional to 11,979.80, 16,529.28 and 9,002.78

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Solution

The fourth proportional to 11,979.80, 16,529.28 and 9,002.78 is: 12,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.80 : 16,529.28 = 9,002.78 : x
  2. Step 2: Convert to fraction form
    11,979.80/16,529.28 = 9,002.78/x
  3. Step 3: Cross multiply
    11,979.80x = 16,529.28 × 9,002.78
  4. Step 4: Simplify right side
    11,979.80x = 148,809,471.40
  5. Step 5: Solve for x
    x = 148,809,471.40/11,979.80
  6. Step 6: Final answer
    x = 12,421.70

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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.