Home / 15,755.26-21,742.32-8,681.66

Finding the Fourth Proportional to 15,755.26, 21,742.32 and 8,681.66

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Solution

The fourth proportional to 15,755.26, 21,742.32 and 8,681.66 is: 11,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.26 : 21,742.32 = 8,681.66 : x
  2. Step 2: Convert to fraction form
    15,755.26/21,742.32 = 8,681.66/x
  3. Step 3: Cross multiply
    15,755.26x = 21,742.32 × 8,681.66
  4. Step 4: Simplify right side
    15,755.26x = 188,759,429.85
  5. Step 5: Solve for x
    x = 188,759,429.85/15,755.26
  6. Step 6: Final answer
    x = 11,980.72

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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.