Home / 15,487.26-21,372.36-8,772.86

Finding the Fourth Proportional to 15,487.26, 21,372.36 and 8,772.86

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Solution

The fourth proportional to 15,487.26, 21,372.36 and 8,772.86 is: 12,106.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.26 : 21,372.36 = 8,772.86 : x
  2. Step 2: Convert to fraction form
    15,487.26/21,372.36 = 8,772.86/x
  3. Step 3: Cross multiply
    15,487.26x = 21,372.36 × 8,772.86
  4. Step 4: Simplify right side
    15,487.26x = 187,496,722.15
  5. Step 5: Solve for x
    x = 187,496,722.15/15,487.26
  6. Step 6: Final answer
    x = 12,106.51

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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.