Home / 12,482.10-18,720.96-5,460.78

Finding the Fourth Proportional to 12,482.10, 18,720.96 and 5,460.78

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Solution

The fourth proportional to 12,482.10, 18,720.96 and 5,460.78 is: 8,190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,482.10 : 18,720.96 = 5,460.78 : x
  2. Step 2: Convert to fraction form
    12,482.10/18,720.96 = 5,460.78/x
  3. Step 3: Cross multiply
    12,482.10x = 18,720.96 × 5,460.78
  4. Step 4: Simplify right side
    12,482.10x = 102,231,043.95
  5. Step 5: Solve for x
    x = 102,231,043.95/12,482.10
  6. Step 6: Final answer
    x = 8,190.21

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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.