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Finding the Fourth Proportional to 18,825.72, 28,235.16 and 7,135.08

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Solution

The fourth proportional to 18,825.72, 28,235.16 and 7,135.08 is: 10,701.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825.72 : 28,235.16 = 7,135.08 : x
  2. Step 2: Convert to fraction form
    18,825.72/28,235.16 = 7,135.08/x
  3. Step 3: Cross multiply
    18,825.72x = 28,235.16 × 7,135.08
  4. Step 4: Simplify right side
    18,825.72x = 201,460,125.41
  5. Step 5: Solve for x
    x = 201,460,125.41/18,825.72
  6. Step 6: Final answer
    x = 10,701.32

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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.