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Finding the Fourth Proportional to 18,458.70, 27,688.05 and 10,164.30

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Solution

The fourth proportional to 18,458.70, 27,688.05 and 10,164.30 is: 15,246.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.70 : 27,688.05 = 10,164.30 : x
  2. Step 2: Convert to fraction form
    18,458.70/27,688.05 = 10,164.30/x
  3. Step 3: Cross multiply
    18,458.70x = 27,688.05 × 10,164.30
  4. Step 4: Simplify right side
    18,458.70x = 281,429,646.62
  5. Step 5: Solve for x
    x = 281,429,646.62/18,458.70
  6. Step 6: Final answer
    x = 15,246.45

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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.