Home / 12,359.78-18,539.51-2,999.88

Finding the Fourth Proportional to 12,359.78, 18,539.51 and 2,999.88

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Solution

The fourth proportional to 12,359.78, 18,539.51 and 2,999.88 is: 4,499.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.78 : 18,539.51 = 2,999.88 : x
  2. Step 2: Convert to fraction form
    12,359.78/18,539.51 = 2,999.88/x
  3. Step 3: Cross multiply
    12,359.78x = 18,539.51 × 2,999.88
  4. Step 4: Simplify right side
    12,359.78x = 55,616,220.06
  5. Step 5: Solve for x
    x = 55,616,220.06/12,359.78
  6. Step 6: Final answer
    x = 4,499.77

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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.