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Finding the Fourth Proportional to 12,368.50, 18,528.01 and 7,435.42

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Solution

The fourth proportional to 12,368.50, 18,528.01 and 7,435.42 is: 11,138.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,368.50 : 18,528.01 = 7,435.42 : x
  2. Step 2: Convert to fraction form
    12,368.50/18,528.01 = 7,435.42/x
  3. Step 3: Cross multiply
    12,368.50x = 18,528.01 × 7,435.42
  4. Step 4: Simplify right side
    12,368.50x = 137,763,471.21
  5. Step 5: Solve for x
    x = 137,763,471.21/12,368.50
  6. Step 6: Final answer
    x = 11,138.25

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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.