Home / 21,145.50-29,180.79-11,715.89

Finding the Fourth Proportional to 21,145.50, 29,180.79 and 11,715.89

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Solution

The fourth proportional to 21,145.50, 29,180.79 and 11,715.89 is: 16,167.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.50 : 29,180.79 = 11,715.89 : x
  2. Step 2: Convert to fraction form
    21,145.50/29,180.79 = 11,715.89/x
  3. Step 3: Cross multiply
    21,145.50x = 29,180.79 × 11,715.89
  4. Step 4: Simplify right side
    21,145.50x = 341,878,779.85
  5. Step 5: Solve for x
    x = 341,878,779.85/21,145.50
  6. Step 6: Final answer
    x = 16,167.92

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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.