Home / 21,867.15-30,176.72-12,435.72

Finding the Fourth Proportional to 21,867.15, 30,176.72 and 12,435.72

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Solution

The fourth proportional to 21,867.15, 30,176.72 and 12,435.72 is: 17,161.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.15 : 30,176.72 = 12,435.72 : x
  2. Step 2: Convert to fraction form
    21,867.15/30,176.72 = 12,435.72/x
  3. Step 3: Cross multiply
    21,867.15x = 30,176.72 × 12,435.72
  4. Step 4: Simplify right side
    21,867.15x = 375,269,240.44
  5. Step 5: Solve for x
    x = 375,269,240.44/21,867.15
  6. Step 6: Final answer
    x = 17,161.32

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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.