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Finding the Fourth Proportional to 18,841.10, 28,258.86 and 7,154.30

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Solution

The fourth proportional to 18,841.10, 28,258.86 and 7,154.30 is: 10,730.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,841.10 : 28,258.86 = 7,154.30 : x
  2. Step 2: Convert to fraction form
    18,841.10/28,258.86 = 7,154.30/x
  3. Step 3: Cross multiply
    18,841.10x = 28,258.86 × 7,154.30
  4. Step 4: Simplify right side
    18,841.10x = 202,172,362.10
  5. Step 5: Solve for x
    x = 202,172,362.10/18,841.10
  6. Step 6: Final answer
    x = 10,730.39

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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.