Home / 23,179.76-31,983.79-13,621.20

Finding the Fourth Proportional to 23,179.76, 31,983.79 and 13,621.20

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Solution

The fourth proportional to 23,179.76, 31,983.79 and 13,621.20 is: 18,794.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,179.76 : 31,983.79 = 13,621.20 : x
  2. Step 2: Convert to fraction form
    23,179.76/31,983.79 = 13,621.20/x
  3. Step 3: Cross multiply
    23,179.76x = 31,983.79 × 13,621.20
  4. Step 4: Simplify right side
    23,179.76x = 435,657,600.35
  5. Step 5: Solve for x
    x = 435,657,600.35/23,179.76
  6. Step 6: Final answer
    x = 18,794.74

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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.