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Finding the Fourth Proportional to 18,683.40, 28,033.20 and 9,449.40

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Solution

The fourth proportional to 18,683.40, 28,033.20 and 9,449.40 is: 14,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.40 : 28,033.20 = 9,449.40 : x
  2. Step 2: Convert to fraction form
    18,683.40/28,033.20 = 9,449.40/x
  3. Step 3: Cross multiply
    18,683.40x = 28,033.20 × 9,449.40
  4. Step 4: Simplify right side
    18,683.40x = 264,896,920.08
  5. Step 5: Solve for x
    x = 264,896,920.08/18,683.40
  6. Step 6: Final answer
    x = 14,178.20

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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.