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Finding the Fourth Proportional to 18,631.20, 27,946.80 and 17,205.60

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Solution

The fourth proportional to 18,631.20, 27,946.80 and 17,205.60 is: 25,808.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.20 : 27,946.80 = 17,205.60 : x
  2. Step 2: Convert to fraction form
    18,631.20/27,946.80 = 17,205.60/x
  3. Step 3: Cross multiply
    18,631.20x = 27,946.80 × 17,205.60
  4. Step 4: Simplify right side
    18,631.20x = 480,841,462.08
  5. Step 5: Solve for x
    x = 480,841,462.08/18,631.20
  6. Step 6: Final answer
    x = 25,808.40

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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.