Home / 21,511.32-29,684.86-12,080.28

Finding the Fourth Proportional to 21,511.32, 29,684.86 and 12,080.28

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Solution

The fourth proportional to 21,511.32, 29,684.86 and 12,080.28 is: 16,670.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.32 : 29,684.86 = 12,080.28 : x
  2. Step 2: Convert to fraction form
    21,511.32/29,684.86 = 12,080.28/x
  3. Step 3: Cross multiply
    21,511.32x = 29,684.86 × 12,080.28
  4. Step 4: Simplify right side
    21,511.32x = 358,601,420.56
  5. Step 5: Solve for x
    x = 358,601,420.56/21,511.32
  6. Step 6: Final answer
    x = 16,670.36

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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.