Home / 21,515.12-29,691.24-11,955.89

Finding the Fourth Proportional to 21,515.12, 29,691.24 and 11,955.89

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Solution

The fourth proportional to 21,515.12, 29,691.24 and 11,955.89 is: 16,499.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.12 : 29,691.24 = 11,955.89 : x
  2. Step 2: Convert to fraction form
    21,515.12/29,691.24 = 11,955.89/x
  3. Step 3: Cross multiply
    21,515.12x = 29,691.24 × 11,955.89
  4. Step 4: Simplify right side
    21,515.12x = 354,985,199.40
  5. Step 5: Solve for x
    x = 354,985,199.40/21,515.12
  6. Step 6: Final answer
    x = 16,499.34

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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.