Home / 12,320.20-18,476.70-4,421.80

Finding the Fourth Proportional to 12,320.20, 18,476.70 and 4,421.80

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Solution

The fourth proportional to 12,320.20, 18,476.70 and 4,421.80 is: 6,631.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.20 : 18,476.70 = 4,421.80 : x
  2. Step 2: Convert to fraction form
    12,320.20/18,476.70 = 4,421.80/x
  3. Step 3: Cross multiply
    12,320.20x = 18,476.70 × 4,421.80
  4. Step 4: Simplify right side
    12,320.20x = 81,700,272.06
  5. Step 5: Solve for x
    x = 81,700,272.06/12,320.20
  6. Step 6: Final answer
    x = 6,631.41

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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.