Home / 12,519.99-18,780.05-4,200.65

Finding the Fourth Proportional to 12,519.99, 18,780.05 and 4,200.65

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Solution

The fourth proportional to 12,519.99, 18,780.05 and 4,200.65 is: 6,301.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,519.99 : 18,780.05 = 4,200.65 : x
  2. Step 2: Convert to fraction form
    12,519.99/18,780.05 = 4,200.65/x
  3. Step 3: Cross multiply
    12,519.99x = 18,780.05 × 4,200.65
  4. Step 4: Simplify right side
    12,519.99x = 78,888,417.03
  5. Step 5: Solve for x
    x = 78,888,417.03/12,519.99
  6. Step 6: Final answer
    x = 6,301.00

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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.