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Finding the Fourth Proportional to 18,903.42, 28,345.41 and 8,509.50

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Solution

The fourth proportional to 18,903.42, 28,345.41 and 8,509.50 is: 12,759.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.42 : 28,345.41 = 8,509.50 : x
  2. Step 2: Convert to fraction form
    18,903.42/28,345.41 = 8,509.50/x
  3. Step 3: Cross multiply
    18,903.42x = 28,345.41 × 8,509.50
  4. Step 4: Simplify right side
    18,903.42x = 241,205,266.40
  5. Step 5: Solve for x
    x = 241,205,266.40/18,903.42
  6. Step 6: Final answer
    x = 12,759.87

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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.