Home / 21,336.55-29,439.72-12,378.86

Finding the Fourth Proportional to 21,336.55, 29,439.72 and 12,378.86

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Solution

The fourth proportional to 21,336.55, 29,439.72 and 12,378.86 is: 17,080.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,336.55 : 29,439.72 = 12,378.86 : x
  2. Step 2: Convert to fraction form
    21,336.55/29,439.72 = 12,378.86/x
  3. Step 3: Cross multiply
    21,336.55x = 29,439.72 × 12,378.86
  4. Step 4: Simplify right side
    21,336.55x = 364,430,172.32
  5. Step 5: Solve for x
    x = 364,430,172.32/21,336.55
  6. Step 6: Final answer
    x = 17,080.09

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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.