Home / 21,021.16-29,014.50-12,642.60

Finding the Fourth Proportional to 21,021.16, 29,014.50 and 12,642.60

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Solution

The fourth proportional to 21,021.16, 29,014.50 and 12,642.60 is: 17,449.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.16 : 29,014.50 = 12,642.60 : x
  2. Step 2: Convert to fraction form
    21,021.16/29,014.50 = 12,642.60/x
  3. Step 3: Cross multiply
    21,021.16x = 29,014.50 × 12,642.60
  4. Step 4: Simplify right side
    21,021.16x = 366,818,717.70
  5. Step 5: Solve for x
    x = 366,818,717.70/21,021.16
  6. Step 6: Final answer
    x = 17,449.98

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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.