Home / 12,543.36-18,815.28-4,221.84

Finding the Fourth Proportional to 12,543.36, 18,815.28 and 4,221.84

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Solution

The fourth proportional to 12,543.36, 18,815.28 and 4,221.84 is: 6,332.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.36 : 18,815.28 = 4,221.84 : x
  2. Step 2: Convert to fraction form
    12,543.36/18,815.28 = 4,221.84/x
  3. Step 3: Cross multiply
    12,543.36x = 18,815.28 × 4,221.84
  4. Step 4: Simplify right side
    12,543.36x = 79,435,101.72
  5. Step 5: Solve for x
    x = 79,435,101.72/12,543.36
  6. Step 6: Final answer
    x = 6,332.84

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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.