Home / 15,439.90-21,310.56-8,729.41

Finding the Fourth Proportional to 15,439.90, 21,310.56 and 8,729.41

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Solution

The fourth proportional to 15,439.90, 21,310.56 and 8,729.41 is: 12,048.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.90 : 21,310.56 = 8,729.41 : x
  2. Step 2: Convert to fraction form
    15,439.90/21,310.56 = 8,729.41/x
  3. Step 3: Cross multiply
    15,439.90x = 21,310.56 × 8,729.41
  4. Step 4: Simplify right side
    15,439.90x = 186,028,615.57
  5. Step 5: Solve for x
    x = 186,028,615.57/15,439.90
  6. Step 6: Final answer
    x = 12,048.56

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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.