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Finding the Fourth Proportional to 20,008.40, 27,601.80 and 12,940.88

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Solution

The fourth proportional to 20,008.40, 27,601.80 and 12,940.88 is: 17,852.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,008.40 : 27,601.80 = 12,940.88 : x
  2. Step 2: Convert to fraction form
    20,008.40/27,601.80 = 12,940.88/x
  3. Step 3: Cross multiply
    20,008.40x = 27,601.80 × 12,940.88
  4. Step 4: Simplify right side
    20,008.40x = 357,191,581.58
  5. Step 5: Solve for x
    x = 357,191,581.58/20,008.40
  6. Step 6: Final answer
    x = 17,852.08

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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.