Home / 12,359.85-18,539.87-9,891.51

Finding the Fourth Proportional to 12,359.85, 18,539.87 and 9,891.51

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Solution

The fourth proportional to 12,359.85, 18,539.87 and 9,891.51 is: 14,837.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.85 : 18,539.87 = 9,891.51 : x
  2. Step 2: Convert to fraction form
    12,359.85/18,539.87 = 9,891.51/x
  3. Step 3: Cross multiply
    12,359.85x = 18,539.87 × 9,891.51
  4. Step 4: Simplify right side
    12,359.85x = 183,387,260.05
  5. Step 5: Solve for x
    x = 183,387,260.05/12,359.85
  6. Step 6: Final answer
    x = 14,837.34

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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.