Home / 21,116.58-29,140.47-11,685.21

Finding the Fourth Proportional to 21,116.58, 29,140.47 and 11,685.21

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Solution

The fourth proportional to 21,116.58, 29,140.47 and 11,685.21 is: 16,125.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.58 : 29,140.47 = 11,685.21 : x
  2. Step 2: Convert to fraction form
    21,116.58/29,140.47 = 11,685.21/x
  3. Step 3: Cross multiply
    21,116.58x = 29,140.47 × 11,685.21
  4. Step 4: Simplify right side
    21,116.58x = 340,512,511.45
  5. Step 5: Solve for x
    x = 340,512,511.45/21,116.58
  6. Step 6: Final answer
    x = 16,125.36

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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.