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Finding the Fourth Proportional to 27,994.40, 38,638.80 and 19,623.20

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Solution

The fourth proportional to 27,994.40, 38,638.80 and 19,623.20 is: 27,084.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,994.40 : 38,638.80 = 19,623.20 : x
  2. Step 2: Convert to fraction form
    27,994.40/38,638.80 = 19,623.20/x
  3. Step 3: Cross multiply
    27,994.40x = 38,638.80 × 19,623.20
  4. Step 4: Simplify right side
    27,994.40x = 758,216,900.16
  5. Step 5: Solve for x
    x = 758,216,900.16/27,994.40
  6. Step 6: Final answer
    x = 27,084.59

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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.