Home / 15,744.69-21,729.02-8,672.45

Finding the Fourth Proportional to 15,744.69, 21,729.02 and 8,672.45

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Solution

The fourth proportional to 15,744.69, 21,729.02 and 8,672.45 is: 11,968.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.69 : 21,729.02 = 8,672.45 : x
  2. Step 2: Convert to fraction form
    15,744.69/21,729.02 = 8,672.45/x
  3. Step 3: Cross multiply
    15,744.69x = 21,729.02 × 8,672.45
  4. Step 4: Simplify right side
    15,744.69x = 188,443,687.49
  5. Step 5: Solve for x
    x = 188,443,687.49/15,744.69
  6. Step 6: Final answer
    x = 11,968.71

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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.