Home / 12,320.12-18,479.92-4,000.12

Finding the Fourth Proportional to 12,320.12, 18,479.92 and 4,000.12

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Solution

The fourth proportional to 12,320.12, 18,479.92 and 4,000.12 is: 6,000.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.12 : 18,479.92 = 4,000.12 : x
  2. Step 2: Convert to fraction form
    12,320.12/18,479.92 = 4,000.12/x
  3. Step 3: Cross multiply
    12,320.12x = 18,479.92 × 4,000.12
  4. Step 4: Simplify right side
    12,320.12x = 73,921,897.59
  5. Step 5: Solve for x
    x = 73,921,897.59/12,320.12
  6. Step 6: Final answer
    x = 6,000.10

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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.