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Finding the Fourth Proportional to 19,989.76, 27,702.54 and 19,707.88

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Solution

The fourth proportional to 19,989.76, 27,702.54 and 19,707.88 is: 27,311.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.76 : 27,702.54 = 19,707.88 : x
  2. Step 2: Convert to fraction form
    19,989.76/27,702.54 = 19,707.88/x
  3. Step 3: Cross multiply
    19,989.76x = 27,702.54 × 19,707.88
  4. Step 4: Simplify right side
    19,989.76x = 545,958,334.02
  5. Step 5: Solve for x
    x = 545,958,334.02/19,989.76
  6. Step 6: Final answer
    x = 27,311.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.