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Finding the Fourth Proportional to 18,607.60, 27,911.40 and 12,702.70

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Solution

The fourth proportional to 18,607.60, 27,911.40 and 12,702.70 is: 19,054.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.60 : 27,911.40 = 12,702.70 : x
  2. Step 2: Convert to fraction form
    18,607.60/27,911.40 = 12,702.70/x
  3. Step 3: Cross multiply
    18,607.60x = 27,911.40 × 12,702.70
  4. Step 4: Simplify right side
    18,607.60x = 354,550,140.78
  5. Step 5: Solve for x
    x = 354,550,140.78/18,607.60
  6. Step 6: Final answer
    x = 19,054.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.