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Finding the Fourth Proportional to 12,362.70, 18,544.05 and 3,128.70

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Solution

The fourth proportional to 12,362.70, 18,544.05 and 3,128.70 is: 4,693.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,362.70 : 18,544.05 = 3,128.70 : x
  2. Step 2: Convert to fraction form
    12,362.70/18,544.05 = 3,128.70/x
  3. Step 3: Cross multiply
    12,362.70x = 18,544.05 × 3,128.70
  4. Step 4: Simplify right side
    12,362.70x = 58,018,769.24
  5. Step 5: Solve for x
    x = 58,018,769.24/12,362.70
  6. Step 6: Final answer
    x = 4,693.05

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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.