Home / 13,612.20-18,779.94-8,899.17

Finding the Fourth Proportional to 13,612.20, 18,779.94 and 8,899.17

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Solution

The fourth proportional to 13,612.20, 18,779.94 and 8,899.17 is: 12,277.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.20 : 18,779.94 = 8,899.17 : x
  2. Step 2: Convert to fraction form
    13,612.20/18,779.94 = 8,899.17/x
  3. Step 3: Cross multiply
    13,612.20x = 18,779.94 × 8,899.17
  4. Step 4: Simplify right side
    13,612.20x = 167,125,878.65
  5. Step 5: Solve for x
    x = 167,125,878.65/13,612.20
  6. Step 6: Final answer
    x = 12,277.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.