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Finding the Fourth Proportional to 18,359.76, 25,337 and 12,991.80

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Solution

The fourth proportional to 18,359.76, 25,337 and 12,991.80 is: 17,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,359.76 : 25,337 = 12,991.80 : x
  2. Step 2: Convert to fraction form
    18,359.76/25,337 = 12,991.80/x
  3. Step 3: Cross multiply
    18,359.76x = 25,337 × 12,991.80
  4. Step 4: Simplify right side
    18,359.76x = 329,173,236.60
  5. Step 5: Solve for x
    x = 329,173,236.60/18,359.76
  6. Step 6: Final answer
    x = 17,929.06

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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.