Home / 36,128.18-54,178.80-12,429.09

Finding the Fourth Proportional to 36,128.18, 54,178.80 and 12,429.09

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Solution

The fourth proportional to 36,128.18, 54,178.80 and 12,429.09 is: 18,639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,128.18 : 54,178.80 = 12,429.09 : x
  2. Step 2: Convert to fraction form
    36,128.18/54,178.80 = 12,429.09/x
  3. Step 3: Cross multiply
    36,128.18x = 54,178.80 × 12,429.09
  4. Step 4: Simplify right side
    36,128.18x = 673,393,254.59
  5. Step 5: Solve for x
    x = 673,393,254.59/36,128.18
  6. Step 6: Final answer
    x = 18,639.01

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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.