Home / 12,310.20-18,421.56-9,015.12

Finding the Fourth Proportional to 12,310.20, 18,421.56 and 9,015.12

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Solution

The fourth proportional to 12,310.20, 18,421.56 and 9,015.12 is: 13,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.20 : 18,421.56 = 9,015.12 : x
  2. Step 2: Convert to fraction form
    12,310.20/18,421.56 = 9,015.12/x
  3. Step 3: Cross multiply
    12,310.20x = 18,421.56 × 9,015.12
  4. Step 4: Simplify right side
    12,310.20x = 166,072,573.99
  5. Step 5: Solve for x
    x = 166,072,573.99/12,310.20
  6. Step 6: Final answer
    x = 13,490.65

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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.