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Finding the Fourth Proportional to 18,884.40, 28,326.60 and 9,042.90

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Solution

The fourth proportional to 18,884.40, 28,326.60 and 9,042.90 is: 13,564.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.40 : 28,326.60 = 9,042.90 : x
  2. Step 2: Convert to fraction form
    18,884.40/28,326.60 = 9,042.90/x
  3. Step 3: Cross multiply
    18,884.40x = 28,326.60 × 9,042.90
  4. Step 4: Simplify right side
    18,884.40x = 256,154,611.14
  5. Step 5: Solve for x
    x = 256,154,611.14/18,884.40
  6. Step 6: Final answer
    x = 13,564.35

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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.