Home / 21,110.72-29,128.02-12,611.18

Finding the Fourth Proportional to 21,110.72, 29,128.02 and 12,611.18

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Solution

The fourth proportional to 21,110.72, 29,128.02 and 12,611.18 is: 17,400.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.72 : 29,128.02 = 12,611.18 : x
  2. Step 2: Convert to fraction form
    21,110.72/29,128.02 = 12,611.18/x
  3. Step 3: Cross multiply
    21,110.72x = 29,128.02 × 12,611.18
  4. Step 4: Simplify right side
    21,110.72x = 367,338,557.62
  5. Step 5: Solve for x
    x = 367,338,557.62/21,110.72
  6. Step 6: Final answer
    x = 17,400.57

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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.