Home / 21,176.31-29,211.09-13,204.70

Finding the Fourth Proportional to 21,176.31, 29,211.09 and 13,204.70

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Solution

The fourth proportional to 21,176.31, 29,211.09 and 13,204.70 is: 18,214.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.31 : 29,211.09 = 13,204.70 : x
  2. Step 2: Convert to fraction form
    21,176.31/29,211.09 = 13,204.70/x
  3. Step 3: Cross multiply
    21,176.31x = 29,211.09 × 13,204.70
  4. Step 4: Simplify right side
    21,176.31x = 385,723,484.55
  5. Step 5: Solve for x
    x = 385,723,484.55/21,176.31
  6. Step 6: Final answer
    x = 18,214.86

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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.