Home / 15,429.76-21,292.88-8,356.03

Finding the Fourth Proportional to 15,429.76, 21,292.88 and 8,356.03

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Solution

The fourth proportional to 15,429.76, 21,292.88 and 8,356.03 is: 11,531.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.76 : 21,292.88 = 8,356.03 : x
  2. Step 2: Convert to fraction form
    15,429.76/21,292.88 = 8,356.03/x
  3. Step 3: Cross multiply
    15,429.76x = 21,292.88 × 8,356.03
  4. Step 4: Simplify right side
    15,429.76x = 177,923,849.05
  5. Step 5: Solve for x
    x = 177,923,849.05/15,429.76
  6. Step 6: Final answer
    x = 11,531.21

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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.