Home / 21,116.39-31,611.48-12,771.16

Finding the Fourth Proportional to 21,116.39, 31,611.48 and 12,771.16

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Solution

The fourth proportional to 21,116.39, 31,611.48 and 12,771.16 is: 19,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.39 : 31,611.48 = 12,771.16 : x
  2. Step 2: Convert to fraction form
    21,116.39/31,611.48 = 12,771.16/x
  3. Step 3: Cross multiply
    21,116.39x = 31,611.48 × 12,771.16
  4. Step 4: Simplify right side
    21,116.39x = 403,715,126.03
  5. Step 5: Solve for x
    x = 403,715,126.03/21,116.39
  6. Step 6: Final answer
    x = 19,118.57

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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.