Home / 12,429.04-18,644.40-4,221.04

Finding the Fourth Proportional to 12,429.04, 18,644.40 and 4,221.04

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Solution

The fourth proportional to 12,429.04, 18,644.40 and 4,221.04 is: 6,331.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.04 : 18,644.40 = 4,221.04 : x
  2. Step 2: Convert to fraction form
    12,429.04/18,644.40 = 4,221.04/x
  3. Step 3: Cross multiply
    12,429.04x = 18,644.40 × 4,221.04
  4. Step 4: Simplify right side
    12,429.04x = 78,698,758.18
  5. Step 5: Solve for x
    x = 78,698,758.18/12,429.04
  6. Step 6: Final answer
    x = 6,331.85

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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.