Home / 14,015.20-20,979.60-8,154.40

Finding the Fourth Proportional to 14,015.20, 20,979.60 and 8,154.40

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Solution

The fourth proportional to 14,015.20, 20,979.60 and 8,154.40 is: 12,206.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,015.20 : 20,979.60 = 8,154.40 : x
  2. Step 2: Convert to fraction form
    14,015.20/20,979.60 = 8,154.40/x
  3. Step 3: Cross multiply
    14,015.20x = 20,979.60 × 8,154.40
  4. Step 4: Simplify right side
    14,015.20x = 171,076,050.24
  5. Step 5: Solve for x
    x = 171,076,050.24/14,015.20
  6. Step 6: Final answer
    x = 12,206.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.