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Finding the Fourth Proportional to 18,694.60, 28,041.90 and 7,007.20

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Solution

The fourth proportional to 18,694.60, 28,041.90 and 7,007.20 is: 10,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,694.60 : 28,041.90 = 7,007.20 : x
  2. Step 2: Convert to fraction form
    18,694.60/28,041.90 = 7,007.20/x
  3. Step 3: Cross multiply
    18,694.60x = 28,041.90 × 7,007.20
  4. Step 4: Simplify right side
    18,694.60x = 196,495,201.68
  5. Step 5: Solve for x
    x = 196,495,201.68/18,694.60
  6. Step 6: Final answer
    x = 10,510.80

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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.