Home / 14,115.20-21,129.60-8,254.40

Finding the Fourth Proportional to 14,115.20, 21,129.60 and 8,254.40

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Solution

The fourth proportional to 14,115.20, 21,129.60 and 8,254.40 is: 12,356.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,115.20 : 21,129.60 = 8,254.40 : x
  2. Step 2: Convert to fraction form
    14,115.20/21,129.60 = 8,254.40/x
  3. Step 3: Cross multiply
    14,115.20x = 21,129.60 × 8,254.40
  4. Step 4: Simplify right side
    14,115.20x = 174,412,170.24
  5. Step 5: Solve for x
    x = 174,412,170.24/14,115.20
  6. Step 6: Final answer
    x = 12,356.34

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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.